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...hilly 1987|link=Embryology History - Ronan O'Rahilly|Ronan O'Rahilly (1987 Carnegie Labs)]] ...t study,<ref name=Weller1933>{{Ref-Weller1933}}</ref> used the following [[Carnegie Collection]] embryos: stage {{CS9}} (No. {{CE1878}}), {{CS10}} ({{CE391}};

[[File:Carnegie_Institute_of_Washington_logo.jpg|thumb|Carnegie Institute of Washington]] ...The papers documented not only early human development, using mainly the [[Carnegie Collection]] of embryos, but also that in animal models of development.

...the earlier months are even more rare. Streeter (’19) reported that in the Carnegie collection there were only forty—three specimens, of which all but two we ...hments of the two yolk stalks lay at different regions of the chorion. An embryo was present in each amniotic sac (fig. 1).

[[Carnegie stage 3]] ...eeding stage in development. It is to be remembered that at all stages the embryo is a living organism, that is, it is a going concern with adequate mechanis

{{Carnegie No.20 Header}} ...0 mm. embryo by compared with a similar cast of the same canal in a 30 mm. embryo, it will be seen that the general form of the canal in the older specimen i

2 This twin specimen belongs in the collection of the Carnegie Institution, where it is listed as no. {{CE1126}}. Acknowledgment is due th ...Schwalbe’s (’06) well-known reconstructions, based upon the Spee 1.54-mm. embryo, are purely hypothetical. Beside the present case, the only other illustrat

2 This twin specimen belongs in the collection of the Carnegie Institution, where it is listed as no. {{CE1126}}. Acknowledgment is due th ...Schwalbe’s (’06) well-known reconstructions, based upon the Spee 1.54-mm. embryo, are purely hypothetical. Beside the present case, the only other illustrat

...esophagus of the chick embryo of the fifth day is occluded for a length of 115 microns, but regains partial patency again in the sixth day through the app ...e solid esophagus. But he regards an atresia of the esophagus in the human embryo as abnormal at all stages (p. 368).

...psule. These human embryos are [[Carnegie Embryos]] and fetuses from the [[Carnegie Collection]]. ...ation of the Cavities in the Cartilaginous Capsule of the Ear in the Human Embryo=

...r I will submit anatomical evidence arguing strongly for the idea that the embryo may also begin the independent regulation of certain phases of its eliemist ...things, however, it is not possible to experiment directly with_ the human embryo, and our knowledge of the intrauterine physiology of the individual must be

...er birth. This development generates the most complex structure within the embryo and the long time period of development means in utero insult during pregna Neuralation begins at the trilaminar embryo with formation of the notochord and somites, both of which underly the ecto

...escribed embryo measured 11 mm CRL, probably corresponding to [[week 6]] [[Carnegie stage 16]]. A reconstructed model was also illustrated in the paper. '''Modern Pages:''' [[Carnegie stage 16]] | [[Week 6]]

...storic 1938 paper by Baxter and Boyd describes a 10 somite human embryo, [[Carnegie stage 10]] occurring in [[Week 4]] of development. ...ategory:Carnegie Stage 10]] | [[Week 4]] | [[Somitogenesis|8 somites]] | [[Carnegie Collection]] [[Book - Contributions to Embryology|Contributions to Embryolo

...t. This study used human embryos from the [[Harvard Collection]] and the [[Carnegie Collection]] ...n the development of the human adrenal cortex from its inception until the embryo has grown to a length of 20 mm. Special attention has been given to the gen

==Appendix 1 - Embryos In The Carnegie Collection== The Carnegie specimens of stages 2-23 are listed in the following tables.

=Notes on Irregularities of Ovogenesis and Abnormal Development of the Embryo in Cavia= ...f deviations from the normal in the early stages in the development of the embryo of Cavia. These specimens were obtained during a series of investigations o

...ar ducts, successively, and almost covered the membranous labyrinth at the 115-mm CRL stage or later. In those samples, several ossification centers were ...miR-183) are differentially expressed in the CVG compared to NC and OV at Carnegie developmental stage {{CS13}}. We further identified transcription factors t

...omandibular joint, that connecting the mandible to the skull. Pater uses [[Carnegie Collection]] embryos: {{CE1318}}, {{CE1455}}, {{CE3990}}, {{CE5652}}, {{CE6 ...The investigation was supported by a grant from the fellowship fund of the Carnegie Institution of Washington and by the Department of Anatomy, Medical College

...ioned and stained. Of the embryos and fetuses studied, 152 belonged to the Carnegie Institution Department of Embryology. The remaining specimens were from the ...s to Dr. G. L. Streeter for the use of the Embryo1ogical Collection of the Carnegie Institution and supplying figures 15, 16, and 17. I also wish to thank Pro

[[Carnegie stage 9]] Now that the neural groove and the first somites are present, the “embryo proper” may be said to have been formed (van Oordt, 1921). The criteria u

...e free to use our judgment in methods of fixation and preservation. If the embryo is perfectly fresh or possibly living, we use, of course, the most refined ...straight and other measurements and weights also are taken. The age of the embryo is estimated on the basis of weight, crown-rump, and foot length, and the e

...the ossicles in the middle ear were independent in different locations. At Carnegie Stage 17 a homogeneous interzone clearly defined the incus and malleus anla Cross-section of human embryo [[Carnegie stage 22]] during [[Week 8]].

Department of Embryology, Carnegie Institution of Washington, Baltimore, Marylayid ...ch other and to the vertebral column. The migration of these organs in the embryo has given us the explanation of the peculiar course of their nerves of supp

...Mark_Hill.jpg|90px|left]] This 1935 paper by Gilbert describes early human embryo hypophysis (pituitary) development. ...hms, ’32; Gilbert, ’34). These investigations have shown that in the early embryo the ventral surface ectoderm of the head is closely adherent to the floor

...he United States Public Health Service and Department of Embryology of The Carnegie Institution of Washington. The three smaller embryos were fixed in toto. The 23 mm embryo was cut into three blocks and the 35 mm fetus was cut into 6 blocks before

...he United States Public Health Service and Department of Embryology of The Carnegie Institution of Washington. The three smaller embryos were fixed in toto. The 23 mm embryo was cut into three blocks and the 35 mm fetus was cut into 6 blocks before

...Mall describes the human embryos in the collection that would become the [[Carnegie Collection]]. There is also a [[:File:1904 - Catalogue of the collection of [[Carnegie Collection]] | [[Carnegie Embryos]]

...to age fetuses based upon their bone ossification using embryos from the [[Carnegie Collection]]. ...gth (months) group (millimeters) (millimeters) 2 3 Up to so 69 3 19 81-135 115 ‘ 4 32 136-175 157 5 54 176-215 194 6 74 216-255 233 41 M 33 F 7 ’ 67 2

...les R. Essick describes human embryonic {{neural}} development using the [[Carnegie Collection]] embryos. [[Carnegie Embryos]] used in this study: {{CE227}}, {{CE75}} {{CE86}} {{CE145}} {{CE1

...ube with two dilatations: one represents a ruptured chorionic sac with its embryo still inside: the other sac was unruptured, entirely distinct from the firs ...a tubal pregnancy described by Mall ('15) and ]\Ieyer ('20), listed in the Carnegie collection as no. 825 (fig. 2). Externally the tube bore a single swelling

...pg|90px|left]] This historic 1927 paper described development of the mouse embryo. Paper currently in Draft form. (From the Department of Genetics, Carnegie Institution of Washington, Cold Spring Harbor.)

...y Atlas of the 13-mm. Pig Embryo. (Prefaced by younger stages of the chick embryo.) The Wistar Institute Press, Philadelphia, iv & 104 pp. Corner, G. W., 1915. The corpus luteum of pregnancy as it is in swine. Carnegie Inst., Contrib. to E-mbryoL, Vol. 2, pp. 69-94.

The author wishes to thank Dr. G. L. Streeter of the Carnegie Institution of Washington at Baltimore for the privilege of studying a larg ...rom the spinal accessory cell column in the upper cervical cord of a human embryo (no. 1433B). Camera lucida drawing. Pyridine silver preparation. X 750,

:'''Links:''' [[Book_-_Contributions_to_Embryology|Carnegie Institution of Washington - Contributions to Embryology]] ...ns thick and stained with hematoxylin and eosin; the brain of a dog-fetus, 115 mm., serial No. Can. 1, cut in transverse sections 20 microns thick and sta

The measurements of the embryo are as follows: C.R., crown-rump or sitting height; C.H., crown—hee1 or s <div id="Carnegie Embryo 6"></div>

...belonging very largely in the later months of pregnancy, while that in the Carnegie Collection, on the other hand, belongs very largely in the earlier months. The records of the Carnegie Collection contained 8 cases of hydatiform mole in the first 2,400 accessio

...er birth. This development generates the most complex structure within the embryo and the long time period of development means in utero insult during pregna ...uctural integrity of neurons was already aberrant in the FGR cerebellum at 115 d GA, and by 124 d GA, inflammatory cells (Iba-1+ immunoreactivity) were si

...oved since this historic human study. This embryo has been classified as [[Carnegie stage 7]] in [[Week 3]]. {{Carnegie stage 7 links}}

Human crown rump length Probable age ' Method of embryo no. in millimeters in weeks preparation H. 1360 17 7 Pyridine silver H. 119 ...’08) has shown that the motor elements in the brain stem of a 10 mm. human embryo form a continuous column which extends from the spinal cord into the medull

...uman ova are obtained only rarely, and the early development of the human. embryo is not known with great accuracy. Such specimens are therefore of some valu ...obliquity of the sections makes the interpretation of the features of the embryo difficult, and it is very doubtful if a reconstruction of the ovum would se

...lection [[:Category:Carnegie Embryo 1399|Embryo No.1399]], classified as [[Carnegie stage 8|'''Stage 8''']] occurring during [[Week 3]]. ...Poor || Formol || P || Trans. || 10 || {{HE}} etc. || 1916 || "Mateer embryo" described by Streeter (1920) <ref>{{Ref-Streeter1920a}}</ref>

...treeter (1873-1948)]] describes the [[:Category:Carnegie Embryo 2|Carnegie Embryo No. 2]] [[Carnegie_stage_15|stage 15]] was first described in {{Ref-Mall189 {{Carnegie stage 15 links}}

...'etalon international de folliculine cristallisee. Compt. rend. Soc. biol. 115, 299. Fuss, A. 1911. Uber extraregioniaire Geschlechtzellen bei einem Menschhchen Embryo von vier wochen. Anat. Am. 39, 407.

Department of Embryology, Carnegie Institution of Washington, Baltimore, Mn. ...th its associated tiny mass of protoplasm, which alone will make the chick embryo, becomes all but lost on the surface of the yolk. But that speck of protopl

...human embryos in detail ([[:Category:Teacher-Bryce Embryo 2|Teacher-Bryce Embryo 2]]) and compares these two with the other known (named) human embryos of t =IV. The Development of the Vascular System in the Human Embryo prior to the Establishment of the Heart=

...eter of 148^. in other unfertilized ova described the diameter varied from 115/1-134/1 In the Lewis ovum the vitellus completely filled the zonal cavity a ...l the cytoplasm is divided into two giving nse to a two cell st ige of the embryo or ovum (Fig 28B and C) Each of the daughter cells contains an equal number

...logue.jpg|200px|alt=Orts Llorca Madrid embryo catalogue|Orts Llorca Madrid embryo catalogue|left]] ...ble us to draw the following conclusions. The truncus appears in the human embryo, between Stages XII and XIII, as a portion of the aortic sac which invagina

By A. M. Hain (Carnegie Research Fellow), The Institute of Animal Genetics, Edinburgh University, ...y defrayed by grants (to A.M.H.) from the Medical Research Council and the Carnegie Trust for the Universities of Scotland.

...90px|left]] [[Historic Embryology Papers]] | [[Embryonic Development]] | [[Carnegie Collection]] =Cyclopia in the Human Embryo=

...Washington, D. C. Published By The Carnegie Institution Of Washington 1915 Carnegie Institution Of Washington Publication No. 223 Press Of Gibson Brothers Wash ...s and their relation to the development of the vena cava and azygos in the embryo pig=

embryo. ==Embryo==

Carnegie Institution of Washington - Year Book No. 37 Published By Carnegie Institution Of Washington

===1. Some of the Developmental Problems Faced by the Embryo After Gastrulation=== ...e mesodermal tubes in the Amphibia resembles to a degree that in the shark embryo (fig. 217B, E).

{{Waterston1917 embryo table}} ...structions of developing hearts, and particularly his model of the 2.5—mm. embryo of R. MEYER’s collection, which is a most valuable specimen.

...d in a majority of gilts in which all of the uterus was removed except one embryo and its corresponding portion of uterine horn on the 12th day of pregnancy. The Corpus Luteum of Pregnancy As It Is in Swine. Carnegie Inst. Contr. Embryol. 5: 69.

....jpg|90px|left]] This 1940 paper by Keith describes abnormalities in human embryo development. ...ge L. Streeter,‘ who has presided over the Department of Embryology of the Carnegie Institution, Washington, for many years and whose important contributions t

Department of Embryology, Carnegie Institution of Washington, Baltimore, Maryland ...ovulationem, leaving only five and one-half days‘ actual development of the embryo to birth. The rate of development is compared with Eutherian mammals.

...t of the female gamete as the entire sperm generally enters the egg (figs. 115, 118), However, in some species the tail of the sperm may be left out, e.g. ...h he believed was the essential element in that it contained the preformed embryo in an intangible way. That is, the sperm animalcule of the ram contains a l

...e, it was nevertheless apparent that a venous injection of the body of the embryo was often produced, and the impression was gained that a communication exis ...om the mouth, reaching it by way of the Eustachian tube. Using, in the pig embryo, the heart as the mechanism for injecting the ink, extravasation from the c

===3. Basic Structure of the Vertebrate Skin in the Embryo=== In the embryo of the shark, chick, and mammal, the single-layered condition of the primit

...viously primitive character was seen in the thoracic cord of a 5—mm. human embryo, it seemed worth While to examine the suitable younger specimens available ...by grants from the Penrose Fund of the American Philosophical Society, the Carnegie Corporation of New York and the University of Pittsburgh.

embryo without the cooperation of the female, and whether the result is male enlarged compartment where the egg or developing embryo may be retained.

...s thesis by Stewart describes development of the blood supply to the human embryo basal ganglia. =The Development of the Blood Supply to the Human Embryo Basal Ganglia=

embryo (Heuser and Streeter, 1941 ; Hertig embryo extract prepared from 19- to 20day-old guinea pig embryos (Blandau and

namely, is there a separate germinal plasm set apart in the early embryo which used to refer to those germ cells which possibly segregate early in the embryo,

...oker from the Penrose Fund of the American Philosophical Society, from the Carnegie Corporation of New York, and from the University of Pittsburgh. ...lar components in the thoracic portion of the spinal cord of a 55-cm. calf embryo. He corroborated the findings of Ramon y Cajal in general but declared tha

...ernal appearance and dimensions suggest that it is a [[Carnegie stage 19]] embryo ([[Week 7]], 48 - 51 days, 16 - 18 mm). {{Carnegie stage 19 links}}

...ls sie stehenden Wirbelthieren, erseheinen aber aueh bei dem menselilieben Embryo nieht vor Ablauf der ersten beiden Monate nach der Bmpfangniss. ...it they communicate with the exterior by a common opening. In the 4.75-mm. embryo (fig. 7) the naso-hypophyseal invagination has shifted toward the dorsal si

structural relationships between the developing embryo and the uterus. These comprise a succession of stages of placental metabolic demands of the developing embryo and fetus.

...yolk. This substance contains the principal foodstuffs for the developing embryo. Studies on the yolk of the hen’s egg indicate that it contains water (50 ...ter chapters that the animal pole marks the anterior end of the developing embryo and the vegetal pole marks the posterior end. There is also reason to belie

Carnegie Institution Of Washington, Department Of Embryology, The Johns Hopkins Univ in the embryo is controlled by a hormone,

Koelliker (’7 9) has noted in a rabbit embryo of eleven days a close relation between the anterior end of the notochord a caudal surface of Rathke’s pouch. In a 4.5-mm. embryo he saw

...s were fertilized and were in stages from the one-celled to the six-celled embryo. Five of the twentyfour sows mentioned were obtained before a method of dis ...ictured in her recent contribution to the early vasculogenesis of the pig (Carnegie Institution of Washington, Contributions to Embryology, No. 18, 1917).

...mparatively recent years three authors have been so fortunate as to obtain embryo monotremes, on the skull of which they have worked. Fig. 1. - ''Ornithorhynchus paradoxus''. Embryo delta. J. T. Wilson Coll. Ventral aspect of a model of the

the embryo of the mouse and rabbit is lower embryo, until the sprouting of the primary

...dly number of which have appeared from the Department of Embryology of the Carnegie Institution of Washington. ...generosity of Dr. Carl G. Hartman from the Department of Embryology of the Carnegie Institution. These three macaque monkeys (Macaca mulatta) were killed on th

| These are links to other normal Carnegie Collection numbered embryos available on this educational site. {{Carnegie numbered embryo links}}

...:l1lnt‘llse‘):(l-Jltelltlir hzziiid, are stiallrfgigalilllrilgef oliile T]-115 behavlor 1“ the ...act that it was once thought that a very large portion of each side of the embryo always originated from this ring in a manner to be described below (see con

112-115 days the development of the embryo.

{{Ref-Stockard1921}} Thirty-two text figures and six plates 115 ...) stated that there are present in the developing islet cells of the sheep embryo minute safranophile granules. These have since been observed by Laguesse ('

...empt was made to destroy just enough tissue along the dorsal aspect of the embryo to insure complete elimination of the neural-crest material and leave the v ...rophotographically in figures 1 and 2, which are taken from sections of an embryo of the chick (14) ^ which was subjected to operation at the close of the se

...he Biological Laboratory of the Maine Agricultural Experiment Station, No. 115. ...p. 1391. Corner, G. W. 1915 Corpus luteum of pregnancy as it is in swine. Carnegie

...that described for other hemopoietic organs, e.g., yolk-sac of 10-mm. pig embryo, 5 yolk-sac of mongoose embryos, 6 and red bone-marrow. 7 ...of mesenchymal 'angioblasts' in the living blastoderm of the two-day chick embryo grown in Locke's solution, by which the blood-vessel lumen forms. But these

From the Department of Embryology, Carnegie Institution of Washington, Baltimore, Maryland ...ation of the cavities in the cartilaginous capsule of the ear in the human embryo. Amer. Jour. Anat., vol. 22.

Aided by the Carnegie Institution. ...us structures in the wall of the cerebral vesicle and neural tube of a cat embryo undoubtedly relate to mitochondria.

Staff Member, Department of Embryology, Carnegie Institution Of Washington. Baltimore. Maryland cent from the initial value of 115 niEq./l.

...ATION OF THE CAVITIES IN THE CARTILAGINOUS CAPSULE OF THE EAR IN THE HUMAN EMBRYO== Department of Embryology, Carnegie Institution of Washington, Baltimore,

University of Cincinnati Carnegie Institution WARREN H. LEWIS Carnegie Laboratory oj Embryology, Johns Hopkins Medical School

A. In a salmon embryo after Furst. The position of the cell body. They share in its trophic functions, as is nerve of an embryo of

...tion of the marsupial blastocyst with the trophoblast of the Eutheria, the embryo of the former, therefore, being without trophoblastic covering. ...esh state and in most sections. They measure on the slide about 0.137 by 0.115 mm., but range from 0.135 by 0.12 to 0.098 by 0.086 mm. The eggs of batch N

h) Communications of the "Institut International d'Embryo logie" (Embryological section of the I.U.B.S.) P List of members of the "In ...Uruguay. S. America. •BURNS. R. K. B.S., Ph.D., Prof. — Dep. of Embryol., Carnegie Inst.

Translation by Joat V Nonidu Carnegie Institution Wuhington Translation by Jos6 P. Nonidez Carnegie Institution of Washington

115 115 Ox

...presents the direction of the first outgrowth of the cochlear pouch of the embryo. As shown by Streeter ('07) for the human, this first growth of the cochlea and the acoustic and facial nerves in the human embryo. Am. Jour.

University of Cincinnati Carnegie Institution Ruth Stocking Lynch. The cultivation in vitro of liver cells from the chick embryo. Twenty-five figures 281

...poeeilus maculatus. One text figure and four plates (twenty-eight figures) 115 Howard Brown Stough. Modified mitosis in the chick embryo. Eight plates (sixty figures) 535

Mabel Bishop. The nervous system of a two-headed pig embryo. Twenty figures 379 115

...paraffin bath heated by electricity. Am. Nat., vol. 37, no. 434, 1903, pp. 115-119. ...t of the College of the City of New York measured the weight and length of 115 specimens. It therefore occurred to me to determine the relation of weight

...probably for the carotids." Thus the evi ' See the figures of the skull in embryo marsupials, edentates, insectivores, etc., as figured by Broom, Parker and ...n so far as they lie between the pterygoids and the quadrates. Likewise in embryo mammals the cartilaginous alae temporalis are interpreted by Broom ('09) as

Embryo: nine to fourteen days’ incubation 12 ...nd. The realiza- tion of the expectation of finding cortical tissue in the embryo- logical stages of the right ovary was previously anticipated by Willier (

...erning certain cytological characteristics of the erythroblasts in the pig embryo and the origin of non-nucleated erythrocytes by a process of cytoplasmic co ==The Development Of The Rectum In The Human Embryo==

Sthrtevant, a. H. 1919 Inherited linkage variations in the second chromosome. Carnegie Inst., Wash;, publ. 278, pp. 305-341. ...tructures and which are resolved into chromomeres after such division” (p. 115). Since this definition requires an additional explanation of the word ‘

...ent peculiarly favorable m.aterials for studies of this character, for the embryo becomes functional at a very early stage of differentiation, in this respec ...m of response to any sort of excitation applied to the trunk region of the embryo, viz., a swim,ming reaction, and the same neurones are involved throughout

C. W. M. PoYXTER. Some observations on wound healing in the early embryo. Twelve figures ...nd Atterbury. Bursa and tonsilla pharyngea; a note on the relations in the embryo calf. Eight figures 251

115 ...idently would have shown less conformity if they had been obser\^ed in the embryo stage. (JSTewmann's Fig, 38.)

Translation by Jos6 F. Nonidez Carnegie Institution of Washington 8 1917 The microscopic structure of striped muscle in Limulus. Pub. 251, Carnegie Institution of Washington, pp. 273-290.

115 Carnegie Institution of Washington

...f the Scala tympani, Scala vestibuli and perioticular cistern in the human embryo. Nine figures 299 Embryo 12.84

...all lightly twice, and hesitated momentarily three times. In the remaining 115 cases, the turn was made accurately and unhes- itatingly. On the other hand 99-115. 1898.

The youngest embryo in which any of the air-sacs appear as In the same embryo may be seen the first indication of the

Fig. 1. Cephalic veins of a late embryo of Tropidonotus natrix, head 7.5 mm. long. X 24. After Grosser and Brezina, ...the jaw and runs dorsad on the lateral aspect of the pterygoid bone. In an embryo Lacerta Avith head 5.2 mm. long this vein is connected with the vena mandib

...esearch rooms" at Woods Hole wishes to acknowledge his indebtedness to the Carnegie Institution for the opportunities thus presented for the carrying on of thi Prentiss, Pctipheral Netzvorks. 115

...ite brains and its relation to the area striata. With sixteen text figures 115 ...ples of the development of the systemic lymphatic vessels in the mammalian embryo 399

...bryos were arranged accord- ing to measurement rather than age. The oldest embryo of the first series was 9.4 mm. in length, and the later series were select ...al cavity and in the pharynx, buds that resemble mature buds of the oldest embryo studied in all essential details except size. The later maturing of the tas

...e take place, as is shown in the caudal end of the Wolffian body of a deer embryo of 6.4 mm. (fig. 3), where the increased growth of one limb of the transver ...uricular canal, and the adult relations reproduce essentially those of the embryo. Hence their comihon histological characters in the adult and the intimate

...Whether or not the ganglion cells observed by Rubaschin ('03) in the chick embryo represent cells of the nervus terminalis is problematical. This writer desc In the human embryo Johnston found essentially the same central relations as in the pig, but th

...hyme cells is relatively low, as their origin from the basal region of the embryo might lead us to expect. This being the case, they are less affected by sli ...(Child, 16 c). According to Boveri ('01 a, '01 b) the apico-basal axis of embryo and larva coincides with the axis of the growing oocyte in Strongylocentrot

130. 115. 107. 109.5 117. 103. 105. 12. Osborne, T. B., and Mendel, L. B.: Publications of the Carnegie Institution of Washington, 1911, Bull. No. 156.

...A study on the depth of penetration of ultraviolet light-ray energy in the embryo of the tadpole 323 ...gland form accessory glands. According to Keibel and ]\Iall, in the female embryo few glands are formed, three being the maximum number. These may undergo de

P. E. Smith. The effect of hypophysectomy in the early embryo upon the growth and development of the frog. Ten figures 57 ...in to function, lymph begins to collect in the intercellular spaces of the embryo and, as we know, is subseciuently collected by a set of newly formed vessel

Host., 1918, xvi. 1-29: 94-115; 171-199. III. 115<11i.

...r H. Slifer, Insect development. If. Mitotic activity in the grassliopjier embryo. Two figures 013 ...trient organs, or pseudoplacenta, until shortly before birth. At birth the embryo is a little more than one-third the adult body length and bears strongly de

...ennent have made experiments in which the paternal influence in the hybrid embryo was diminished. Tennent states that in the cross between Hipponoe and Toxop ' Tennent, Publication 132, Carnegie Institution, 1910.

...hem to enlarge and function. Again, that large venous network in the early embryo which is associated with the azygos vein and which later disappears may be ...pment of the lymphatics of the lungs of the embryo pig. Contrib. Embryol. (Carnegie Inst.), Wash., 1916, IV, 47.

==On The Development Of The Blood-Vessels Of The Brain In The Human Embryo== ...teries had been injected with Prussian blue, which, together with numerous embryo pigs injected alive or immediately after death, form the basis of this stud

food substances. Carnegie Institution of Washington, Publication ...ich was studied primarily by physicians to explain the growth of the human embryo, can likewise receive little attention in the medical school. These subject

...e from each and consequently no defects except in size would appear in the embryo. Experiments on later stages, however, indicate absence of localization as ...ved and the remaining one will develop into a perfectly normal but smaller embryo. Morgan- succeeded in producing such embryos and I have also been able to d

...and it is entirely possible that this region of the central cavity in the embryo was much more suggestive of the fourth ventricle. Judging from the adult al ...Tcr. and Dean that Polistotrema possesses well-developed ventricles in the embryo; the expansion being fully as great as in a similar stage of Petromyzon. As

...hns Hopkins University and Director of the Department of Embryology of the Carnegie Institution of Washington. We who in thought lingered at his bedside during ...ion, the directorship of the newly created Department of Embryology of the Carnegie Institution of Washington. The University of Michigan honored him and honor

a. Chromosomes in the embryo 3 a. Chromosomes in the embryo

...the earliest neuro-muscular responses to tactile stimuli in the amphibian embryo. During the season of 1907 these experiments were continued upon embryos of ...with a most important phase of behavior, namely, its very beginning in the embryo. If, for instance, there is any such thing as a ^'simple reflex," such as S

Henry Denison. Note on Pathological Changes found in the Embryo Pig and its Membranes, with one figure 2.~3 ...sents a section taken through the anterior thoracic region of a 16 mm. cat embryo in which both azygos veins are of large

arrow indicates the direction of the axis of the future embryo, b, bristle. ...de of the blastoderm is away from the observer, and the axis of the future embryo is ill a diagonal position, as indicated in Fig. 1. These fig-ures (A of th

The pus obtained on the 10th of March reached the Carnegie Laboratory on the 11th, accompanied by a message stating that it came from ...2l8t of September was collected in a sterilized test-tube and sent to the Carnegie Laboratory. It was delayed in transit and had an offensive odor when receiv

are comparatively numerous in the embryo, and in the adult the resting A, From a 7 mm. embryo; B, from one of 26 mm.; ch,

...minal viscera through the spinal column; "\'eraguth COl) described a human embryo with ectopia of the spleen and intestines. Finally, in 1917, Williams descr ...ech., Bd. 11. Good, J. P. 1912 Spina bifida in the neck region of a ferret embryo 8 mm.

...ems to be required for growth and development of the nervous tissue in the embryo. ...Institute for Medical Research. By cultivating in vitro parts of the chick embryo lens containing cells from the iris, a pure outgrowth of epithelial cells w

...to 5.0 per cent at 25 grams, 2.7 per per cent at 55 grams, 1.5 per cent at 115 grams, 1.2 per cent at 155 grams, 0.9 per cent at 205 grams, and 0.62 per c 142.1- (115.9-156.7)

THORACIC DUCT OF ADULT GUINEA PIG 115 ...r regions of the body. The sweat glands first make their appearance in the embryo in these regions. These areas also lend themselves readily to an extensive

...inophilies, the fixed mesenchymal cells may also give rise to them. In the embryo, hematopoietic mesenchyme is widely distributed. In the adult the bone-marr 0.115

Fig. 23 Caudal end of a bo nun. Alustelus embryo. Note that the pores of canals of the head. In a 36 mm. embryo the lateral sensory

...s R. Stockard. The artificial production of eye abnormalities in the chick embryo. Two plates 33 ...uming a defect in the absorption of the primitive right aortic arch in the embryo. Absorption occurs ordinarih' distal to the point of origin of the right su