File:Hertig1945d fig10.jpg

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Fig. 10. A mid-cross section of an 11.5-day ovum

The amniotic cavity is more advanced in its development than in the previous specimens although the amniogenic cells— now a distinct membrane - are still attached to the adjacent trophoblast. The exocoelome is now well contained within its membrane which is continuous above with the primitive endoderm of the germ-disk. Mesoblast formation is still continuing and is laying the foundation for the future connective tissue of the chorion. Carnegie 7699 section 8-5-3, X 100.


Hertig AT. On the development of the amnion and exocoelomic membrane in the previllous human ovum. (1945) Yale J Biol Med. 18:107-15. PubMed 21007544

Cite this page: Hill, M.A. (2024, April 25) Embryology Hertig1945d fig10.jpg. Retrieved from

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

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