Category:Carnegie Stage 14

From Embryology
Carnegie Stage 14 Embryo
Carnegie Stage 14 Embryo

This Embryology category shows pages and media related to Carnegie stage 14 occurring in Week 5, 31 - 35 days, CRL 5 - 7 mm, Gestational Age GA week 7.

There is also a specific Carnegie stage 14 resource page. See also Carnegie Stage 14 - Events


Stage 14 Links: Week 5 | Head | Lecture - Limb | Lecture - Gastrointestinal | Lecture - Head Development | Science Practical - Gastrointestinal | Science Practical - Head | Movie - Embryo stage 14 | Carnegie Embryos | Category:Carnegie Stage 14 | Next Stage 15
  Historic Papers: 1918 | 1926 Precervical Sinus | 1956 | 1959


Week: 1 2 3 4 5 6 7 8
Carnegie stage: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23


Carnegie Stages: 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | About Stages | Timeline


Carnegie Collection Embryos - Stage 14 
Serial No. Size (mm) Grade Fixative Embedding Medium Plane Thinness (µm) Stain Year Notes
4 E.,7 Poor p P Transverse 10 Al. coch. 1892
18 E.,7 Ch., 18x18 Poor p P Transverse 20 Al. coch. 1895
80 E., 5.0 Ch., 24x18x8 Good Alc. P Transverse 20 Al. coch. 1897
187 E.,7 Ch., 35x30x25 Poor ? P Sagittal 20 Al. coch. 1902
1208 E.,7 Ch., 22x11Xx1 Poor ? P Sagittal 20 Al. coch. 1902
245 E.,6 Ch., 13x12x10 Poor Formol, Zenker ? Transverse 5 (Stain - Haematoxylin Eosin) 1904
372 E.,7 Fair p P Transverse 10 H.-Congo red 1902
380 E,6 Ch., 20x20x14 Poor p P Sagittal 20 (Stain - Haematoxylin Eosin) 1906
387 E.,7 Ch., 45x40x50 Good Formol P Transverse 20 (Stain - Haematoxylin Eosin) 1907
442 E.,6 Ch., 25x20 Poor Formol P Coronal? 50 Al. coch. 1908
552 E.,6 Ch, 40x28Xx8 Poor p P Sagittal 40 Al. coch. 1911 Possible anencephaly
560 E., 7.0 Ch, 24x24 Poor Formol P Coronal 40 Al. coch. 1912
676 E., 6.0 Ch, 35x20x17 Good Carnoy P Tr.-Coronal 20 (Stain - Haematoxylin Eosin) 1913 Possible spina bifida
873 E,6.0 Ch., 35x28x16 Poor Formol P Sagittal 20 Al. coch. 1914
988 E,6.0 Ch., 38x30x23 Good Formol-corros. acetic P Transverse 20 Al. coch. 1914
1380 E , 5.7 Ch, 36x24x24 Exc. Formol P Coronal 20 Al. coch. 1916
1620 E, 6.6 Ch, 35x30x8 Good Formol P Sagittal 20 Al. coch. 1916
?? E, 6.68 Fair ? ? Transverse 6 Al. coch., or. G 1919
2841 E , sy Ch. 35x21 Good Alc. P Transverse 20 (Stain - Haematoxylin Eosin) or.G 1920
3360 E.6.0 Good Formol C Transverse 20 (Stain - Haematoxylin Eosin) or.G 1920 In myomatous uterus. Advanced.
3805 E., 5.9 Exc. Bouin P Transverse 15 (Stain - Haematoxylin Eosin) 1921 Evans embryo No. 168. Serial bromides only
3960 E., 5.5 Good Formol C-P Coronal 20 Al. coch. 1922 Blood vessels naturally injected
4154 E, 6.8 Ch., 33x31x20 Poor Alc. C-P Transverse 8 (Stain - Haematoxylin Eosin) 1923
4245-6 E., 7.0 Good Formol P Transverse 15 Al. coch. 1923 Univ. Pennsylvania No. 40. Ag added
4692 E., 6.5 Ch., 32x23 Good Formol C-P Sagittal 10 (Stain - Haematoxylin Eosin) 1924
4672 E,8.2 Ch., 40X34X25 Good Formol P Transverse 20 Al. coch. 1924 Advanced
4805 E., 7.3 Ch., 15X8X9 Good Formol C-P Transverse 10 (Stain - Haematoxylin Eosin) 1924 Tubal
5437 E., 7.0 Good Formol C-P Transverse 8 (Stain - Haematoxylin Eosin) 1927 Advanced
5654 E., 5.0 Ch., 30x23x17 Good Formol P Transverse 10 Al. coch., eosin 1928 Less advanced
5787 E., 6.8 Ch., 32x30x23 Good Formol P Sagittal 10 Al. coch., eosin 1928
6428 E., 7.0 Ch., 30X28X25 Good Formol C-P Coronal 6, 10 Al. coch. 1931 Advanced
6500 E, 4.9* Good Souza? C-P Sagittal 10 Al. coch. 1931 E. Leitz, Berlin
6502 E., 6.7* Exc. Souza? C-P Transverse 5, 10 (Stain - Haematoxylin Eosin) 1931 E. Leitz, Berlin. Ag added to slides 1-25
6503 E., 6.3* Exc. Souza? C-P Coronal 10 Al. coch. 1931 E. Leitz, Berlin
6739 E.,8 Poor Formol C-P Sagittal 20 (Stain - Haematoxylin Eosin) 1933
6830 E,5.5 Ch., 47x23x15 Exc. Formol C-P Coronal 8 (Stain - Haematoxylin Eosin) 1933
6848 E., 7.8 Good Formol C-P Coronal 10 (Stain - Haematoxylin Eosin) 1934 Tubal
7324 E, 6.6 Ch., 17x13x10 Good Formol C-P Transverse 8 (Stain - Haematoxylin Eosin) 1936 Low implantation
7333 E, 6.3 Good Formol C-P Transverse 8 (Stain - Haematoxylin Eosin) 1936
7394 E, 7.2 Ch., 45x20x20 Exc. Formol C-P Transverse 8 (Stain - Haematoxylin Eosin) 1937
7400 E, 6.3 Ch., 35x25x20 Good Formol C-P Coronal 10 (Stain - Haematoxylin Eosin) 1937
7522 E., 7.7 Ch., 33x16x16 Good Formol C-P Transverse 8 (Stain - Haematoxylin Eosin) 1938 Natural blood injection
7598 E., 7.0 Ch., 30x30x25 Poor Alc. C-P Transverse 10 (Stain - Haematoxylin Eosin) 1938 Macerated
7667 E., 5 Ch., 16x14x12 Fair Formol P Transverse 8 (Stain - Haematoxylin Eosin), phlox. 1939
7829 E., 7.0 Exc. Bouin C-P Transverse 8 (Stain - Haematoxylin Eosin) 1940 Advanced
7870 E,7.2 Ch., 25x20x13 Exc. Bouin C-P Transverse 8 (Stain - Haematoxylin Eosin) 1941 On borderline of next stage. Ag added
8141 E,7.3 Ch.,33x28 Exc. C-P Coronal 8 (Stain - Haematoxylin Eosin) 1943 Shrinkage cracks in brain
8306 E.5.3 Ch., 27 Exc. Bouin C-P Transverse 10, 20 (Stain - Haematoxylin Eosin), phlox. 1945
8308 E, 5.85 Ch., 27x18x18 Exc. Formol & Bouin C-P Sagittal 8 Azan 1945
8314 E,8 Ch.,23x22 Exc. Formol C-P Transverse 8 Azan 1945
8357 E., 6.5 Good Formol C-P Sagittal 8 Azan 1946
8552 E,6.5 Exc. Alc. & Bouin C-P Transverse 8 Azan 1947
8999 E,6 Ch.,16x15 Exc. Alc. & Bouin C-P Sagittal 8 Azan 1952
9695 E,8.5 ? 1955 Not cut
Abbreviations
  • Size - E. is the greatest length of the embryo and Ch. is the mean diameter of the chorion.
  • Grade - total grade of the specimen and includes both its original quality and the condition of the mounted sections.
  • Embedding medium - paraffin (P) or a combination of celloidin and paraffin (C-P).
  • Fixative - formalin (Formol), alcohol and formalin (Alc, formol), Bouin (Bouin solution)
  • Stain -
  •  ? - unknown or not determined.
  • Mesoderm: continued segmentation of paraxial mesoderm (30+ somite pairs), heart prominence
  • Head: 1st, 2nd and 3rd pharyngeal arch, forebrain, site of lens placode, site of otic placode, stomodeum
  • Body: heart, liver, umbilical, upper and early lower limb bud

Embryo Examples

  • H. Braus, 6 mm embryo, Heidelberg. Enlarged views of this well-preserved curettage specimen are included in the Hochstetter (1907)[1] Cited by Streeter (1945).[2] portfolio of pictures of the outer form of a series of human embryos. The nasal plate is more advanced than in others of this stage, but the limb buds are like those of the older members of the group.
  • E. Gasser, 6.5 mm. Leydig embryo, Marburg Anatomisches Institut. Description of this advanced embryo is in the Keibel and Elze Normentafeln (1908).[3]
  • J. A. Hammar, 5 mm Vestberg embryo, Anatomisches Institut, Uppsala. Embryo described by Hammar in the Keibel and Elze Normentafeln.[3] Typical sections and models of the pharyngeal region and gut are illustrated. This well-preserved embryo has been studied by several investigators, including Hammar on the development of the foregut, salivary glands, and tongue, and Broman on the development of the diaphragm and omental bursa.
  • His, embryo R, 5.5 mm. Illustrated by His (1885).[4] It was concluded by His that this embryo approximated the Fol embryo (stage 13). The lens pit indicates stage 14. This assignment is supported by other features: e.g., the ductus venosus.
  • His, embryo B, 7 mm, and embryo A, 7.5 mm. These two embryos are described jointly, in great detail, by His (1880).[4] Embryo A is evidently a little more advanced than embryo B and perhaps should be placed in stage 15.
  • Jordan 7 mm human embryo [5]
  • Keibel, 6.5 mm embryo “forensis.” Embryo described in the Keibel and Elze Normentafeln.[3] This embryo was used by Keibel in a series of studies on the development of the urogenital system.
  • Keibel, 6.8 mm embryo, No. 501. Embryo included in the Keibel and Elze Normentafeln.[3] It is described in monographic form by Piper (1900).[6]
  • Strabl, 6.75 mm embryo (Walther), Giessen. Described in the Keibel and Elze Normentafeln.[3]The external form is pictured by Hirschland (1898).[7]
  • 6.5 mm embryo, University of Minnesota. Drawings of external views of this and of a 2.9-mm (stage 11) embryo were published by Wells and Kaiser (1959).[8]
  • Free Hospital for Women, Brookline, Massachusetts, No. 33, 6 mm, No. 29, 7 mm, and No. 31, 7 mm. The histochemistry of these embryos of stage 14 was studied by McKay et al. (1956).[9]


References

  1. Hochstetter, F. 1907. Atlas. Munich.
  2. Streeter, G. L. 1945. Developmental horizons in human embryos. Description of age group XIII, embryos about 4 or 5 millimeters long, and age group XTV, period of indentation of the lens vesicle. Carnegie Instn. Wash. Publ. 557, Contrib. Embryol., 31, 27-63.
  3. 3.0 3.1 3.2 3.3 3.4 Keibel, F., and Elze, C. 1908. Normentafeln zur Entwicklungsgeschichte der Wirbeltiere.(Normal Plates for Evolution of Vertebrates) 8. Heft Normentafeln zur Entwicklungsgeschichte des Menschen (Vol. 8. Normal Plates of the Development of the Human Embryo) Fisher, Jena., Germany.
  4. 4.0 4.1 His, W. 1880-1885. Anatomie menschlicher Embryonen. Vogel, Leipzig.
  5. Jordan HE. A study of a 7 mm human embryo; with special reference to its peculiar spirally twisted form, and its large aortic cell-clusters Volume 14, Issue 7, pages 479–492, July 1918
  6. Piper, H. 1900. Ein menschlicher Embryo von 6.8 mm. Nakkenlinie. Arch. Anat. PhysioL, Anat. Abth. Cited by Streeter (1945).
  7. Hirschland, L. 1898. Beitrage zur ersten Entwicklung der Mammarorgane beim Menschen. Anat. Hefte, Abt. I, Heft 34, 35 (Vol. II). Cited by Streeter (1945).
  8. <pubmed>13843903</pubmed>
  9. <pubmed>13403206</pubmed>

Pages in category ‘Carnegie Stage 14’

The following 82 pages are in this category, out of 82 total.

Media in category ‘Carnegie Stage 14’

The following 114 files are in this category, out of 114 total.