Category:Carnegie Embryo 7801

From Embryology

This Embryology category includes pages and images that relate to the Carnegie Collection Embryo No. 7801. This embryo was classified as Carnegie stage 6 occurring during Week 2.

Serial No. Grade Fixative Embedding Medium Thinness (µm) Stain Year Notes
7801 Exc. Bouin C—P 8 (Stain - Haematoxylin Eosin) 1940 Heuser CH. Rock J. and Hertig AT. Two human embryos showing early stages of the definitive yolk sac. (1945) Contrib. Embryol., Carnegie Inst. Wash. Publ. 557, 31: 85-99.
Carnegie Collection - Stage 6 
Serial No. Grade Fixative Embedding Medium Thinness (µm) Stain Year Notes
6026 Poor ? ? 6? (Stain - Haematoxylin Eosin) 1929 Lockyer embryo. Abnormal. Ramsey (1937)
6734 Poor Zenker—acetic P 10 (Stain - Haematoxylin Eosin) 1934 Yale embryo. Ramsey (1938)
6900 Poor Formol P 15 (Stain - Haematoxylin Eosin) 1940 Linzenmeier (1914)
7634 Poor Formol P 10 (Stain - Haematoxylin Eosin) etc. 1940 Torpin embryo. Kraflca (1941)
7762 Good Zenker—formol P 8 ? 1940 Wilson (1945)
7800 Exc. ? C—P 8 (Stain - Haematoxylin Eosin) 1940 Abnormal
7801 Exc. Bouin C—P 8 (Stain - Haematoxylin Eosin) 1940 Heuser et al. (1945)
7850 Exc. Alc. & Bouin C—P 6 (Stain - Haematoxylin Eosin) 1940 Abnormal
8290 Exc. Bouin C—P 8 H. phlox. 1944
8360 Exc. Alc. & Bouin C—P 6 (Stain - Haematoxylin Eosin), phlox. 1944
8362 Poor p C—P 6 (Stain - Haematoxylin Eosin), phlox 1944
8672 Exc. Ale. & Bouin C—P 6 (Stain - Haematoxylin Eosin) 1949
8819 Exc. Formol—chrom. subl. C—P 8 (Stain - Haematoxylin Eosin) 1951 Edwards-Jones-Brewer (H1496). Brewer (1937, 38)[1][2]
8905 Poor Ale. p 6 (Stain - Haematoxylin Eosin), phlox. 1951 Abnormal
8910 Good Formol C—P 8 (Stain - Haematoxylin Eosin), phlox. 1951
9222 Good Bouin C—P 6 & 10 Azan 1954 Abnormal. Possibly stage 7
9250 Exc. Bouin p 8 (Stain - Haematoxylin Eosin) 1954
9595 Poor p p 8 (Stain - Haematoxylin Eosin) 1958
10003 Good Bouin p 5 Various 1963
Abbreviations
  • 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)
  •  ? - unknown or not determined.
References
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
Stage 6 Links: Week 2 | Implantation | Lecture | Practical | Carnegie Embryos | Category:Carnegie Stage 6 | Next Stage 7
  Historic Papers: 1909 | 1925 | 1937


Described in detail and illustrated by Heuser, Rock, and Hertig (1945).[1]

Hysterectomy Posterior wall of uterus. “The primitive villi are short and stubby; a few reach a length of about 0.25 mm.” Chorion, 2.6 x 1.9 x 1.4 mm. Chorionic cavity, 1.3 x 1.1 x 0.8 mm. Embryonic disc, 0.04 x 0.22 x 0.253 mm. Primitive streak, 0.04 mm. “Axial differentiation is just appearing.” “In this embryo the site of the future [cloacal] membrane seems indicated, but not the structure itself.” Probably no allantoic duct. Presumed age, 13-13.5 days. Median projection published (ibid., plate 3).


See also later O'Rahilly and Müller (1987)[2] (figs. 6-5 to 6-10).

References

Media in category ‘Carnegie Embryo 7801’

The following 10 files are in this category, out of 10 total.