File:Hertig1946b fig15.jpg
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Fig. 15. Human Embryo 55 mm and older 14 Week Fetus
A half-tone drawing, natural size, of a 55 mm. embryo (menstrual age 11% weeks), lying within its amniotic sac. The chorion and uterus have been opened so as to expose the innermost membrane. The degenerating yolk-sac is seen at the right as a vesicle attached to the base of the umbilical cord by an attenuated strand—the yolkstalk. (Fig. 31 from Cullen’s “The Umbilicus and Its Diseases,” W. B. Saunders Company.)
B. A section of a slightly older yolk-sac (menstrual age 14 weeks) to show the thick avascular fibrous tissue wall and the degenerated epithelial lining. The lumen contains granular or amorphous debris which is undergoing calcification. The over; lying membrane is the amnion. B. L-i. H., S-35649, X60.
References
Hertig AT. lnvolution of tissues in fetal life: a review. (1946) Anat. Rec. 94: 96-116.
Cite this page: Hill, M.A. (2024, April 28) Embryology Hertig1946b fig15.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Hertig1946b_fig15.jpg
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G
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