1897 Human Embryology - Figures

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Minot CS. Human Embryology. (1897) London: The Macmillan Company.

Human Embryology: Introduction | The Uterus | General Outline of Human Development | The Genital Products | History of the Genoblasts and the Theory of Sex | The Germ-Layers | Segmentation | Primitive Streak | Mesoderm and the Coelom | Germ-Layers General Remarks | The Embryo | The Medullary Groove, Notochord and Neurenteric Canals | Coelom Divisions; Mesenchyma Origin | Blood, Blood-Vessels and Heart Origin | Urogenital System Origin | The Archenteron and the Gill Clefts | Germinal Area, the Embryo and its Appendages | The Foetal Appendages | Chorion | Amnion and Proamnion | The Yolk Sack, Allantois and Umbilical Cord | Placenta | The Foetus | Growth and External Development Embryo and Foetus | Mesenchymal Tissues | Skeleton and Limbs | Muscular System | Splanchnocoele and Diaphragm | Urogenital System | Transformations of the Heart and Blood-Vessels | The Epidermal System | Mouth Cavity and Face | The Nervous System | Sense Organs | Entodermal Canal | Figures | References | Embryology History
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List of Illustrations

1. Connective tissue of mucosa, uterus of pig

2. Vertical section of the mucosa carpus uteri of the first day of menstruation

3. Mucous membrane of a virgin uterus during the first day of menstruation

4. Semi-diagrammatic outline of an antero-posterior section of the gravid uterus and ovum of five weeks

5. Uterus about forty days advanced in pregnancy

6. Uterus one month pregnant ; outlines of the glands from a vertical section

7. Uterus one mouth pregnant ; portion of the compact layer of the decidua seen in vertical section

8. Uterus one month pregnant ; section of gland froiu cavernous layer, with the epithelium partly adherent to the walls

9. Uterus one month pregnant ; section of gland from cavernous layer with the epithelium loosened from the walls

10. Section of the decidua serotina, near the margin of the placenta ; normal uterus about seven months pregnant

11. Decidual cells from the section represented in Fig. 10; stained with alum hsemotoxylin, and eosin

12. Section of human decidua reflexa at two months

13. Uterus twelve hours after artificial deUvery at six months' pregnancy

14. Section of the placental area of the uterus three weeks post partum

15. Vertical section through the wall of a uterus about seven months pregnant, with the foetal membranes in situ

16. Human embryo, 4.2 mm. long

17. Embryo, 2.15 mm. long

18. Diagram of an embryo of fifteen to sixteen days

19. Generalized diagram of an anmiote vertebrate embryo

20. Generalized diagram of an amniote vertebrate embryo before the separation of the amnion

2I. Structure of a rat's spermatozoon

22. Human spermatozoa

23. Peripheral layer of the seminiferous tubule of a rat

24. Column of spermatocytes from the rat

25. Developing spermatoblasts of the rat

26. Developing spermatozoa of a marsupial

27. Human spermatoblasts, to illustrate the rupture of the membrane

28. Sertoli's column, with a basal nucleolated nucleus and a cluster of developing si)ermatoblasts

29. Part of a cross-section of a seminiferous tubule of a rat

30. Egg of Tendra zostericola

31. Primary follicles from the ovary of a woman thirty-one years old

32. Ovary of cat

33. Egg-cell of Tengenaria domestica

34. Full-grown human ovum before maturation

35. Part of the ovum of a mole

36. Ovum of a sea urchin, Toxopneustes lividus

37. Ovarion egg of hsemops

38. Egg of a leech (nephelis), three-quarters of an hour after being laid

39. Ovum of nephelis (a leech), three hours after laying

40. Ovum of a rabbit ; taken from the middle of the oviduct about eighteen hours after coitus

41. Anterior pole of the ovum of the petromyzon, with a spermatozoon

42. Egg of nephelis, three hours after laying

43. Ovum of sagitta with two pronuclei

44. Two ova of the land-snail, arion

45. Ovum of a rabbit seventeen hours after coitus with the pronuclei about to conjugate

46. Ovum of Limax campestris during the first cleavage

47. Blastula stage of Echinocardium cordatum twenty hours after impregnation

48. Segmentation of the egg of the common frog

49. Section of the segmented ovum of axolotl

50. Four stages of the segmentation of the hen^s ovum

51. Ovum of a flounder in transverse vertical section

52. Ovum of a rabbit of twenty-four hours

53. Rabbit's ovum of about seventy hours

54. Ovum of a bat, Vespertilis murina, with four segmentation spheres

55. Ovum of Virginian opossum, with four segments

56. Young blastodermic vesicle of a mole

57. Sections through the inner mass of the blastodermic vesicle of the mole, at three successive stages

58. Ovum of a rabbit, ninety-four hours after coitus

59. Diagram of a seguiented mammalian ovum

60. Ovuui of Amphioxus lanceolatus during segmentation stage, with eighty-eight cells

61. Section of a erastrula of Toxopneustes lividus

62. Diagrams of the principal modiflcations of the gastrula

63. Longitudinal section of an early stage of the gecko

64. Diagram illustrating the growth of the blastoderm and concrescence of its rim to form the primitive axis

65. Diagram of concrescence in a teleostean egg

66. Diagram of an elasmobranch blastoderm to illustrate the formation of the marginal groove

67. Diagram of a vertebrate blastodenu a little more advanced than Fig. 96

68. Ovum of axolotl

69. Ovum of i>etromyzon in longitudinal section

70. Longitudinal section of the ovum of a sturgeon after the formation of the entodermic Cavity

71. Formation of the blastoporic canal in Lacerta mural is

72. Hen's o^1lm ; incubated six hours

73. Diagrammatic cross-section of a vertebrate ovum, in which concrescence is supposed to have been arrested

74. Dog-fish embryo, nearly in Balfour's stage C

75. Germinal area of a guinea-pig at thirteen days and twenty hours

76. Diagram showing the relations of a vertebrate ovum with an embryo in cross-section and a large yolk

77. Sections of axolotl eggs

78. Area pellucida of a hen's egg, with completed primitive furrow

79. Longitudinal section of the region of the primitive streak of a hen’s ovum incubated six hours

80. Transverse sections of a germinative area, with half-formed primitive streak, of a hen's egg

81. Transverse section of the anterior region of a fully developed primitive streak of a hen's ovum

82. Blastodermic vesicle of a rabbit of seven days

83. Transverse section of the embryonic shield of the blastodermic vesicle of a sheep

84. Central portion of a sheep's blastoilermic vesicle of twelve to thirteen days

85. Embryonic shield of a rabbit's ovum of five days

86. Section of the primitive streak of the mole

87. Blast<H]ermic vesicle of Mus sylvaticus

88. Axolotl embryo ; transverse section of an early stage

89. Diagrams of the embryonic area of the chick

90. Diagram of the embryonic area of a chick

91. The mesdermal cavities of the germinal area of a chick of the third day

92. Section of a chicken embryo of about thirty-six hours

93. Transverse section of an amphioxus embryo

94. Amphioxus embryo

95. Opossum embryo of seventy-three hours ; transverse section at the level of the heart

96. Blastoderm of rabbit's ovum

97. Chicken embryo with seven primitive segments

98. Part of a transverse section of a young mole embryo

99. Surface view of a young mole embryo

100. Transverse section of a mole embryo

101. Elarly stage of Amblystoma punctatum

102. Part of a transverse section of an axolotl embryo

103. Transverse section of a rabbit embryo of eight days and two hours

104. Part of a transverse section of an embryo of Lumbricus trapezoides

105. Transverse section of a mole embryo

106. Longitudinal section of the head end of a mole embryo

107. RaVibit embryo of 6 mm.; median longitudinal section of the head

108. Longitudinal sections of the notochord of bombinator

109. DegeneraHng notochord tissue, from the central portion of the intervertebral disc of a cow's embryo

110. Longitudinal section of a frog's ovum, shortly after closure of the medullary groove

111. Transverse section of an embryo paroquet (melopsittacus) to show the anterior or true ueurenteric canal

112. Chicken embryo with one segment

118. Area vasoalosa and embryo with eight segments of a hen's egg

114. Rabbit embryo with eight segments

115. Transverse section of a pristiurus embryo with fourteen segments, through the centre of the fourth segment

116. Transverse section through a recently formed primitive segment of a chicle with eight.een and twenty segments

117. Section of a chick with about twenty segments

118. Head of an embryo of Torpedo ocellata, in Balfour's stage J,

119. Longitudinal vertical section through five primitive segments of a rabbit embryo of nine days and seventeen hours

120. Longitudinal horizontal section through a segment of a rabbit embryo of ten and one-half days

121. Transverse section through the upper i>art of a myotome of a chick of about seventy hours

122. Pristiurus embryo with forty-flve to forty-six segments

123. Diagram of a cross-section of a young amphioxus

124. Surface view of a small part of the vascular network of an embryo chick of two days

125. Vascular anlages of the area vasculosa of a chick of forty hours

126. Section of the area vasculosa of a chick

127. Corpuscles from rabbits, from acanthias, from a chick, from a human embryo

128. Salamandra maculosa ; larva, very young ; transverse section to show the formation of the coelom in the heart region

129. Salamandra maculosa, larva with branchial arches,

129 A. Embryo chick ; section through the anlage of heart

130. Chick embryo

131. Diagrammatic cross-section of a vertebrate to show the fundamental relations of the urogenital system

132. Rana temporaria. Tadpole of 12 mm. Cross-section through the pronephros

133. Nephridium (or Wolffian tubule) of an acanthias embryo of 28.2 mm. , seen from the caudal side ; reconstructed from the sections

134. Section through a Wolffian tubule of a chick with primitive segments, 288

135. Wolffian tubule of a sheep embryo of 9 mm

136. Coste's embryo of thirty-five days

137. Transverse section of the Wolffian body or priiuitive kidney of a rabbit of thirteen days

138. Longitudinal vertical section of the AVolffian body of a rabbit embryo of thirteen days

139. Section through the testis of a human embryo of sixty-three to sixty eight days

140. Transverse section through an advanced embryo of a shark, sy<;m nus lichia ; from the abdominal region (dots represent nuclei)

141. Section of the urogenital fold of a chick embryo of the fourth day

142. Diagrammatic section of the yellow of a hen's egg at an early stage to show the relations of the arehenteron to the yolk-sac

143. Diagrams to illustrate the separation of the embryo from the yolk

144. Cross-section of a rabbit embryo of eight days and two hours

145. Lon^tudin&l seotion of the posterior end of a sheep embryo of sixteen days

146. Longitudinal median section of young chick embryo

147. Transverse section of the head of a chick embryo with seven segments

148. Two views of a wax model of the cavity of the pharynx of a rabbit embryo of eleven days, 264

140. Acanthias embryo of 17 mm. Horizontal section of the anterior half

150. Chicken embryo of sixty-eight hours

151. Acanthias of 17 mm.

152. Cross-section of a branchial arch of an advanced shark embryo

153. Longitudinal section of an embryo of Petromyzon planeri, four days old, reared at Naples

154. Diagrams to indicate the fundamental relatione of the archenteron

155. Chicken embryoand germ area after twenty-seven hours incubation

156. Embryonic area of a rabbit of eleven days, with the placental area partly torn off

157. Diagram of the circulation in a chick at the end of the third day, as seen from the under or ventral side

158. Area vasculosa and embryo of a rabbit

159. Transverse section of the rump of a dog-fish embryo 14 mm. long

160. Section through the rump of a rabbit embryo of eight days and three hours, 282

161. Transverse section of the rump of an embryo chick of the third day, 283

162. Diagrams to illustrate His' theory of the origin of the human amnion

163. Reichert's ovum. Two views engraved from the original plate

164. Cross-section of Spec's embryo

165. Section passing through the blastopore of Spec's embryo

166. Diagram of His' embryo E : age fourteen (?) days; length about 2.3 mm

167. Thomson's second ovum

16lS. Human embryo of thirteen to fourteen days

169. Embryo of the beginning of third week

170. Human embryo of 2.15 mm. ; anatomy reconstructed from the sections

171. His' embryo L, 2.4 mm. long

172. Ovum supposed to be from fifteen to eighteen days old

173. Embryo supposed to be from fifteen to eighteen days old

174. Fragment of the chorion of fig. 4, highly magnified

175. His' embryo M

176. Digestive canal of His' embryo

177. Anterior wall of the pharynx of His' embryo BB, 3.2 mm. long

178. W. His' embryo M

179. Reconstruction of His' embryo BB, 3.2 mm. long

180. Reconstruction of His' embryo

181. Isolated tenninal branch of a villus from the chorion of an embryo of twelve weeks

182. Villous stem from a placenta of the fifth month

183. Terminal villi of a placenta at full term

184. Section of the chorion at three weeks

185. Aborting villus from a chorion of the second month

186. Placental chorion of an embryo of seven months

187. Section of the chorionic membrane of an ovum supposed to belong to the third week

188. Section of the chorionic membrane of an embryo of three weeks

189. Section of the amnion and placental chorion of the fifth month

190. Adenoid tissue of a villus from a placenta of four months

191. Section of the amnion covering the placenta of a two months embryo

192. Two sections of the placental amnion

193. A natural group of nuclei from the mesoderm of the amnion of a fetus of the fifth month

194. Mesodermic nuclei of the amnion of an embryo of about four months

195. Surface view of the amniotic epithelium of an embryo of 144 days

196. Diagram of the development of the foetal adnexa in the rabbit

197. Longitudinal median section of a petromyzon larva

198. Wall of the yolk-sac in the area opaca of a chick of the second day

199. Section of the yolk-sac of a human embryo

200. Diagram of the embryo and yolk-sac of a rabbit

201. Vertical section of the wall of the yolk-sac of a rabbit embryo of thirteen days

202. Diagram of an opossum embryo and its appendages

203. Section of the allantois from the umbilical cord of an embryo of three months

204. Diagrammatic section of the bauclisliel of a human embryo, modified from W. His

205. Sections of human umbilical cords

206. Connective tissue of the umbilical cord of an embryo of 21 mm

207. Connective tissue of the umbilical cord of a human embryo of about three months

208. Epithelial covering of the umbilical cord of an embryo of three months

209. Cross-section of an umbilical cord at term

210. Placenta at full term, doubly injected by Dr. H. P. Quincy to show the distribution of the vessels upon the surface

211. Placenta at full term

212. Mesenchymal tissue of a villus, from a placenta of four months

213. Section through a normal x)lacenta of about seven months, in situ

214. Portion of an injecte<l villus from a placenta of about five months

215. Placenta of about i\\e months ; portion of a small villus

216. His' embryo a, age probably twenty-three days

217. FoFs embryo of 5.6 mm., probably twenty-five days old

218. His' Embryo A, 7.5 mm. longm

219. Embryo of 9.8 mm.m

220. Embryo of about 14 mm

221. Dorsal view of an embryo of about 14 mm.

222. Embryo of about thirty-five days

223. His' embryo XXXI V,

224. Embryo of 22 mm

225. Embryo of 28 mm

226. Embryo of 32 mm

227. Embryo of 34 mm

228. Embryo of 55 mm

229. Embryo of 78 mm.

230. Front view of the head and face of the embryo

381. Embryo of about 120 mm

282. Embryo of 118 mm

238. Embryo of 155 mm

234. Mesenchyma of a chick embryo of the third day from close to the otocyst

285. Omentum of a human embryo of five months

236. Parietal bone of a human embryo of fourteen weeks

237. Transverse section of the mandible of a human embryo of the tenth week

238. Prom a section of an ossifying vertebra of a human embryo of four months

239. Section of a vertebra of the same embryo at right angles to the plane of fig. 238, and corresponding in level to the lower part of the bracket L, fig. 238

240. Artery from the allaiitois of a chick, surrounded by a network of lymphatics

241. Section of the spleen of a human embryo of six months

242. Pat island from the skin of a human embryo of five months

243. Reconstruction of the last occipital, and first two cervical vertebra of a cow embryo of 8.8 mm.

244. Cross-section of the anlage of second cervical vertebra of a cow embryo of 8.8 mm

245. Longitudinal median section of the upper portion of the vertebral column of a cow embryo of 22.5 mm.

246. Prontal projection of the cephalic part of a vertebral column of a cow embryo

247. Embryo pig of about 16 mm

248. Embryo pig« one and one-third inch long

249. Section of the anterior portion of the snout of an embryo pig

250. Embryo pig, six inches long

251. Chondrocranium of an insectivorous mammal (Tatusia)

252. Pectoral fin of a young embryo of sycUium in longitudinal and horizontal section

253. Scapulaof a human embryo of five and one-half inches, dorsal view

254. Vertical section of the ankle of a human embryo of nearly six months

255. Isolated muscle fibres of a frog embryo

256. A, transverse section ; 6, longitudinal section of muscle fibres in the neck of a human embryo of sixty-three to sixty-eight days

257. Chick embryo, transverse section of the upper part of a myotome

258. Transverse section of a branchial arch of a selachian embryo

259. His^ embryo R, 5 mm. Reconstruction to show the septum transversum

260. Head of a rabbit embryo, with segments seen from the under side

261. Rabbit embryo, eight and a half days, with eleven or twelve somites, cross-section

262. Model of part of the pleural and abdominal cavities of a rat embryo at a stage corresponding to a rabbit at fifteen days

263. Section of the supra-renal body of a rabbit embryo of twenty-six days

264. Supra-renal capsule of a four months human embryo

265. Diagram of the indifferent stage of the urogenital system of amniota

266. Diagram to illustrate the homologies of the sexual apparatus

267. Section of the testis of a human embryo of sixty-three to sixty-eight days

268. Section of the ovary of a human embryo of 7 cm.

269. To illustrate the (lecensus te>ticulon]m

270. Cross-section of the ovarj' and Wolffian body of a human embryo of the third month

271. Cross-section of the rectum, genital cord, and allantois of a male human embryo of almost two months

272. Section of broad ligament of a female human embryo of four months

274. Crosft-section through the hind end of the left Wolffian body of a cr^jc/xlile embryoo of 12 mm

274. Section of a kidney, human embryo of about five months

275. Semidiagrammatic figures of developing renal tubules of a mammal

276. Section fiarallel to the medullary rays of the kidney of a human f^jftus of about five months,

277. Cross-section of the medullary tubules of the kidney of a human embryo of almost five months

278. Longitudinal median section of the cloaca of a sheep embryo of 18 mm

279. Longitudinal section of the penis of a human embryo of about five months

280. External genitalia, female embryo of 105 mm

281. Section of the clitoris and labia majora of a human embryo of about four and one-half months

282. Rxternul genitalia of the female human foetus at about four months

283. Head of chirk of thirty-eight hours, seen from the under side

284. Reconstruction of the heart and veinsof a human embryo of 2.15 mm.

284 A. Endothelial heart of a human embryo of 2.15 mm.; seen from the left side

285. Eleconstructed side view of the endothelial heart of a human embryo of 4.2 mm.

287. Model of the muscular heart of a rabbit embryo of nine to nine and one-half days, seen from the left side

288. Endothelial heart of a human embryo of 5 mm.

289. Inner surface of the heart of a human embrvo of 10 mm.

290. Section of the heart and pericardial cavity of a rabbit embryo of ten and one- half days

291. Section in the frontal plane through the heart of a rabbit embryo of thirteen days

292.Oblique section of the heart of a human embryo of 8.5 mm

293. Sections of different levels through the cardiac aorta of a human embryo of 11.5 mm

294. A diagram of pharynx of an amniote vertebrate

295. Anterior wall of the pharynx of a human embryoof 3.2 mm. length

296. Aortic HVHteni of His' embryo Bl., 4.25 mm

297. Aortic system of His' embryo Si, 12.5 mm.; seen from the front

298. Aortic system of W. His' embryo Rg, 11.5 mm

299. Reconstniction of the arteries of the head and neck of a rabbit embryo at the end of the eleventh day

300. His' embryo Lr (4.2 nnn.). Reconstruction to show the course of the blood-vessels

301. Cross-section through the hinder part of His' embryo R (5 mm.)

302. Three diagrams to illustrate the transformation of the venous system

303. lieconstruction of a human embryo (His' Bl.) of 4.25 mm

304. Reconstruction of the venous trunks and liver of His' embryo R, 5 mm

305. Reconstruction of the venous system of His' embryo Rg, 11.5 mm

306. Section of the skin of a human embryo of sixty-three to sixty-eight days

307. Epidennis from the occiput of the human embryo of two and one half months

308. Section of the skin of the under side of the right second toe of four months' embryo

309. Epitrichium of a human embryo of the fifth month

310. Vertical section of the skin of a human embryo of the fifth month

311. Longitudinal section of the nail of the great toe of a human embryo of five months

312. Development of hairs in a human embryo of about seven months

313. Isolated epidermis of a human embryo of five to six months

314. Section of the sole of the foot of a foetus of the fifth month, to show the sweat, glands

315. Development of the mammary gland in the rabbit

316. Acanthias embr\'oof 17 mm., under side

317. Blast odenii of a dog-fish, acanthias. with commencing tioncrescence

318. Longitudinal median section of a recently hatched larva of petromvzon

319. Longitudinal section of an acanthias embryo of 13.2 mm

320. Median section of the head of a rabbit embryo of thirteen and on half days

321. His' embryo A, 7.5 mm.

322. Fiicial region of a human embryo of 8 mm., front view

323. Reconstruction of the face of His' embryo Sell,

324. View of the roof of the mouth of a human embryo

325. Frontal section of the oral and nasal chambers of a young cow embryo

326. Frontal section of the nasal and oral cavities of a human embryo of three months

327. Dental papilla of a dermal tooth of an acanthias embryo of 10 cm

328. Section of the lower jaw of an acanthias embryo of 10 cm.

329. Section of part of the lower jaw of a human embryo of 40 mm.

330. Explanation in text

331. Vertical section of a molar tooth -germ of a human embryo of 160 mm.

332. Part of the enamel organ of a new-born child, incisor germ

333. Odontoblasts from cow embryos. A, of 30 cm.; B, of 24 cm.

334. Section of the submaxillary gland of a human embryo of sixtythree to sixty-eight days,

335. Reconstruction of the pharynx of a human embryo

336. Chick embryo of twenty-nine hours

337. Cross-section through the fore-brain and optic vesicles of a lepidosteus embryo of eight days

338. Brain of embryo No. 22, p. 297

339. Reconstruction of the brain of His' embryo Ko

340. Reconstructed median view of the fore-brain of His' embryo Ko

341. Brain of a human embryo of five weeks

342. Hind-brain of a human embryo

343. Dorsal view of the hind-brain of a human embryo of one month

344. Sections through the cervical part of the medulla of a human embryo with thirteen segments

845. Longitudinal horizontal section of the wall of the hind-brain of a young embryo of a lizard (Anolis Sagrsei)

346. Diagrammatic section of the embryonic spinal cord

347. Section of the medulla and otocysts

348. Sections through the regions 3 and 5 of the hind-brain of His^ embryo, 608

349. Sections through the region 3 of the hind-brain of His' embryo A, 609 850. Four sections of the brain of a human embryo of about five weeks, 609

351. Brain of His' embryo Br. 3, 610

352. Neuroglia of the dorsal zone of the spinal cord of a human embryo of about three and one-half weeks, 613

353. Cross-section of the spinal cord of a human embryo of 14 mm., to show the neuroglia cells

354. Part of a transverse section of the spinal cord of a human embryo of 23 cm

355. From a section of the medulla oblongata of His' embryo Br*

356. Group of motor neuroblasts and nerve fibres from a transverse section of the spinal cord of a cat embryo of ?? mm

357. Bipolar cells from a spinal ganglion of an embryo

358. Transverse section of the dorsal cord and ganglion of a chick of nine days

359. Isolated nerve fibres from the sciatic nerve of a sheep embryo of 150 mm

360. Part of the nerves of a human embryo of 13.8 mm

361. Cells and nuclei from the cervical region of the spinal cord of a human embrvo of one hundred and sixty days

362. Spinal ganglion cells from a longitudinal horizontal section of a human embryo of the tenth week

863. Peripheral nervous system of a human embryo of about 10 mm.

364. Transverse sect ir)n of a mouse embryo of about seventeen to eighteen days through the lumbar region

365. Transverse section of the sympathetic cord from the lower dorsal region of a rat embryo of about thirteen days

306. Sympathetic ganglia of one side of a human embryo of the fifth month

307. Transverse section through the posterior part of the mid-brain of a human embryo of five weeks

308. Section of the brain of a five weeks' embrvo

diV.i. Section of the brain of a five weeks' embryo

870. Section of the brain of a human embryo of five weeks

371. Otocvsis aii<l nerves of a human embrvo of four and one-half week

372 Accmstie ganglia of a human embryo of two months

373 Torpedo embryo of 12 mm

374. Section of the medulla oblongata of a five weeks' human embryo

375. Lower end of the spinal <'ord f»f a human embryo of three months

376. Section of the spinal cord of a human embryo of sixty-three to sixty-eight days no. Pjo

377. Transverse section of the spinal cord from the upper dorsal region of a human embryo of six weeks

3TS. Ix>wer cervical cord of a human embryo of about five months

379. Transverse section of the medulla oblongata of His' embryo Ru

380. Transverse section of the medulla oblongata of His' embryo Mr

381. Section through the medulla oblongata of His' embryo CR

382. Median section of the brain of a chick embryo of about four days

383. Longitudinal med^n section of the cerebellum of a chick of about twelve days

384. Section through the cerebellum and medulla oblongata of a human embryo of one hundred and sixty days

380. Section of the cerebellum of a human embryo of one hundred and sixty days

386. Median section of the head of a sheep embryo of .86 mm.

387. Brain, human foetus, five months

388. Part of the brain of His' embryo CR, 13.6 mm.

389. Section of the thalamencephalon of an embryo of five weeks

390. Section of the fore-brain of a sheep embryo of 27 mm.

391. Brain of a human embryo of about three months

392. Brain of a human embryo of the fourth month

393. Median view of a frog's brain

394. Section through the fore-brain of a foetal guinea-pig

395. Reconstruction of the brain of an embryo of about seven and onehalf weeks

390. Brain of a chick embryo, fourth day

397. Human embryo of about four months ; brain in situ

398. Section through the lateral wall of the cerebral hemisphere of a human embryo of four months

399. View of the hemisphere of a human embryo from the early part of the third month

400. Outlines of the fissure of Sylvius of human embryos at successive lunar months

401. Median view of the fore-brain of a human embryo from the beginning of the third month

402. Brain of human embryo of the fifth month after removal of the right hemisphere

403. Right hemisphere, natural size of a foetus of nearly seven months

404. Under side of the bniin of a human embryo of the fifth month

405. Section of the fore-brain of a human embryo of nearly five weeks

406. Horizontal section of the ciliary ganglion of a young torpedo embryo

407. Reconstruction to show the cephalic ganglia of a petromyzon larva 4 mm. long

408. Rabbit embryo of ten and one-half days ; section of head

409. Riibbit embryo of thirteen days; section of the eye

410. Reconstruction fnMii His' embryo Sch. 13.8 mm.

411. Section through the iris region of the eyelid a chick of thirteen days

412. Rabbit embryo of ten and one-half days : section of the lens anlage

415. Vertical section of the eye of a chick embryo of the third day

414. Section of the distal portion of the optic nerve of a rabbit embryo of thirteen days

415. Surface view of the membrana limitans externa with the developing rods and cones of a chick of fifteen to sixteen days

416. Injected vascular membrane of the retina of the eye of a pig embryo, 16 cm. long

417. Section through the iris region of the eye of a chick of thirteen days

418. United eyelids of a human embryo of about four months, seen in vertical section

419. Sections of human embryos showing the otocyst ; A, embryo of 2.4 mm.; B, embryo of 4 mm.

420. Horizontal section of the otocyst of a chick of the third day

421. Left otocyst of a human embryo of about four weeks ; A, from the inner, B, from the outer side

422. Transverse section of the head of a rabbit embryo of ten and one half days

423. Left otocyst of a human embryo of about five weeks, seen from out side and below

424. Transverse section of the semicircular canal of an embryo rabbit of twenty-four days

425. Left otocyst of a human embryo of about two months

426. Transverse section of scala media cochleee of a rabbit embryo of 55 mm.

427. Section through Corti's organ of the lower coil of the cochlea of a rabbit embryo of 75 mm.

428. Section through the internal ear of a sheep embryo, 28 mm.

429. Isolated right membranous labyrinth of human embryo of six months, seen from in front and outside

430. Section through the region of the ear of a human embryo of three months

431. Development of the human external ear ; A, embryo of one month ; B, six weeks ; C, eight weeks ; D, ten weeks ; E, fourteen weeks

432. Reconstruction of the pharyngeal region of a human embryo of 11.5 mm.

433. From a section of a tonsil of a human embryo of five months

434. Section through the third gill-cleft of a human embryo from the beginning of the third week

435. Reconstruction of the pharyngeal region of a human embryo of 9.1 mm.

430. Reconstructions to show the development of the thyroid gland in the pig; A, embryo of 15 mm.; B, of 16 mm.; C, of 20 mm.; D, of 22.5 mm

437. A, section of the thyroid gland of a human embryo of about four months ; B, a single acinus, more highly magnified

438. Reconstruction of His' embryo B ; the head is drawn as if erected

439. Transverse section of the oesophagus of a human embryo of four months

440. Highly magnified view of a small portion of the epithelium of fig. 4;^9,

441. Reconstruction of Fol's embryo

442. Epithelium of the greater curvature of the stomach of an embryo cat of 85 mm.

443 Peptic glands from the greater curvature of stomach of a human embryo from the end of the eighth lunar month

444. Digestive tracts of four human embryos. A, embryo of 4.2 mm.; B, embryo of 7mm.; C, embryo of 13.8 mm.; D, embryo of 12.5 mm.

445. Two front views of the entodenual canal. A, embryo Sch. 1 of His' B, His' embryo Sch. 2

440. Part of the inte8tine of a human embryo of about six months

447. Section of the small intestine of a human embryo of sixty-three to sixty -eight days

44S. Section of the small intestine of a human embryo of three months

440. Portion of a section of the liver of an acanthias embryo of 20 mm.

450. Section through the liver of a rabbit embryo of thirteen days

451. Section of a rabbit embryo of thirteen days through the region of the fore limbs and liver

452. Section of the t>ancreas of a human embryo of four months

453. Two diagrams to illustrate mori>ho]ogical relations of the vertebrate mesentery ; A, earlier ; B, later condition

454. Diagram to illustrate the relations of the mesentery

455. Diagram of the human mesentery in its primitive relations

456. Diagrams to illustrate the history of the human mesentery. A, earlier ; B, later condition

457. Two diagrams to illustrate the history of the mesentery; A, earlier ; B, later stages

458. Outline of the entodermal canal of His' embryo Lr.

460. Three views of the lungs of a human embryo of 10.5 mm., . 775 4<>0. Lungs of a human embryo of Hve months

461. Cross-section of the bronchial tube of a human embryo of sixty three to sixty-eight days

462. Section through the lung of a human embr>'o of the fourth month, 777

463. Epithelium and gland of the trachea of a four months embryo



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Cite this page: Hill, M.A. (2024, March 19) Embryology 1897 Human Embryology - Figures. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/1897_Human_Embryology_-_Figures

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