Category:Carnegie Embryo 5080

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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.

  • 1 somite
  • Studied and illustrated by Davis (1927, figs. 2–5 and 39–42)[1]
  • Severn (1971, figs. 1–4).[2]
  • First pair of somites not separate rostrally and contain no myocoeles (Arey, 1938).[3]
  • Chorion, 14.5 x 1.5 mm. Embryonic disc, 1.5 mm.
  • Reconstructed by Müller and O'Rahilly (1983, fig. 2).


Stage 9 Links: Week 3 | Gastrulation | Lecture | Somitogenesis | Lecture - Mesoderm | Lecture - Ectoderm | Lecture - Early Vascular | Science Practical | Carnegie Embryos | Category:Carnegie Stage 9 | Next Stage 10
  Historic Papers: 1920 | 1926 | 1945


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)[1]


References

  1. 1.0 1.1 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.
  2. Severn CB. A morphological study of the development of the human liver. I. Development of the hepatic diverticulum. (1971) Amer. J Anat. 131: 133-158.
  3. Arey LB. The history of the first somite in human embryos. (1938) Contrib. Embryol., Carnegie Inst. Wash. Publ. 496, 27: 233-269.



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 Formol P Coronal 10 (Stain - Haematoxylin Eosin) 1917 Described by Ingalls (1920).[1]
5080 1 Embryo, 1.5
Ch., 14.5
Poor Formol P Transverse 10 Al. coch. 1926 Studied by Davis (1927).[2]
7650 2-3 Embryo, 2-3 Good Alc & Bouim 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

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