Category:Carnegie Embryo 662: Difference between revisions

This Embryology category shows pages and images that relate to the Carnegie Collection Embryo No. 662. This embryo would be early fetal development based upon the CRL 120 mm.

References

Kunitomo K. The development and reduction of the tail and of the caudal end of the spinal cord (1920) Contrib. Embryol., Carnegie Inst. Wash. Publ. 272, 9: 163-198.

Embryo No. 662, 80 mm; No. 928, 100 mm; No. 142, 125 mm Crown-Rump Length

As the investigation with embryos Nos. 662, 928, and 142 was not very satisfactory, I shall not attempt to give its results in detail at this time. I have, however, made a special study of the coccygeal medullary vestige because of its importance in comparison with the same structure in younger specimens. In the 80 and 100 mm. embryos the coccygeal vestige is very small and its contained cavity narrower than in the younger specimens. In the 125 mm embryo (negro) the structure is well developed and shows one long offshoot stretching under the epidermis at the sacral region. It is quite different in form and condition from the case reported by Tourneux (Precis d'embryologie humain), and therefore does not present the loop formed by a more deeply situated limb (segment coccygien direct) and a more superficial limb [segment coccygien refleche). In this embryo the coccygeal vestige contains a slender cavity.

Cite this page: Hill, M.A. (2024, April 16) Embryology Carnegie Embryo 662. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Category:Carnegie_Embryo_662

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© Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G