Category:Carnegie Embryo 5080

From Embryology
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This Embryology category relates to the Carnegie Collection Embryo No. 5080. 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
5080 1 E., 1.5
Ch., 14.5
Poor Formol P Trans. 10 Al. coch. 1926 Studied by Davis (1927)Davis CL. Development of the human heart from its earliest appearance to the stage found in embryos of twenty paired somites. (1927) Carnegie Instn. Wash. Publ 380. 19: 245-284.

Carnegie stage 9

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
  1. 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.
  2. 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.
  3. PARK WW. (1957). The occurrence of sex chromatin in early human and macaque embryos. J. Anat. , 91, 369-73. PMID: 13448995

References

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