Category:Carnegie Embryo 5982

This Embryology category relates to the Carnegie Collection Embryo No. 5982. This embryo was classified as Stage 9 occurring during Week 3.

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

Serial No.	Pairs of somites	Size (mm)	Grade	Fixative	Embedding Medium	Plane	Thinness (µm)	Stain	Year	Notes

Carnegie Collection - Stage 9
Serial No.	Pairs of somites	Size (mm)	Grade	Fixative	Embedding Medium	Plane	Thinness (µm)	Stain	Year	Notes
1878	2-3	Embryo, 1.38 Ch., 12x10.5x7.5	Good	Formalin	P	Coronal	10	(Stain - Haematoxylin Eosin)	1917	Described by Ingalls (1920).^[1]
5080	1	Embryo, 1.5 Ch., 14.5	Poor	Formalin	P	Transverse	10	Al. coch.	1926	Studied by Davis (1927).^[2]
7650	2-3	Embryo, 2-3	Good	Alc & Bouin	C-P	Transverse	6	(Stain - Haematoxylin Eosin)	1939	Said to be female^[3]
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 ↑ Ingalls, N.W. 1920. A human embryo at the beginning of segmentation, with special reference to the vascular system. Carnegie Instn. Wash. Publ. 274, Contrib. Embryol., 11, 61-90. ↑ Davis, C. L. 1927. Development of the human heart from its first appearance to the stage found in embryos of twenty paired somites. Carnegie Instn. Wash. Publ 380, Contrib. Embryol., 19, 245-284. ↑ PARK WW. (1957). The occurrence of sex chromatin in early human and macaque embryos. J. Anat. , 91, 369-73. PMID: 13448995

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