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==Fig. 31. The Appearance of the Yolk-sac (Umbilical Vesicle) in a Pregnancy with the Embryo 5.5 cm Long== | |||
The chorion has been split and turned back on the uterine wall. The amniotic cavity is still intact, appearing as a tensely filled oval cyst containing the embryo. Coming from the placental attachment of the umbilical cord is a delicate vaseular thread which passes to the flattened, yellowish, opaque yolk-sac, now referred to as the umbilical vesicle. It remains approximately this size until birth. (See Fig. 32.) | |||
{{Cullen1916 figures1}} | |||
[[Category:Fetal]] |
Revision as of 14:00, 28 October 2018
Fig. 31. The Appearance of the Yolk-sac (Umbilical Vesicle) in a Pregnancy with the Embryo 5.5 cm Long
The chorion has been split and turned back on the uterine wall. The amniotic cavity is still intact, appearing as a tensely filled oval cyst containing the embryo. Coming from the placental attachment of the umbilical cord is a delicate vaseular thread which passes to the flattened, yellowish, opaque yolk-sac, now referred to as the umbilical vesicle. It remains approximately this size until birth. (See Fig. 32.)
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Pages where the terms "Historic" (textbooks, papers, people, recommendations) appear on this site, and sections within pages where this disclaimer appears, indicate that the content and scientific understanding are specific to the time of publication. This means that while some scientific descriptions are still accurate, the terminology and interpretation of the developmental mechanisms reflect the understanding at the time of original publication and those of the preceding periods, these terms, interpretations and recommendations may not reflect our current scientific understanding. (More? Embryology History | Historic Embryology Papers) |
- Figure Links: 1 Human embryo 0.7 mm | 2 Human embryo 1.7 mm | 3 Human embryo 2.5 mm | 4 Human embryo 3.5 mm | 5 Human embryo 5 mm | 6 Human embryo 7 mm | 7 Human embryo 7 mm | 8 Human embryo 10 mm | 9 Human embryo 12.5 mm | 10 Human embryo 10 mm | 11 Human embryo 23 mm | 12 Human embryo 3 cm | 13 Human embryo 4.5 cm sagittal | 14 Human Embryo 4.5 cm | 15 Human Embryo 5.2 cm | 16 Human Embryo 6.5 cm | 17 Human Embryo 7.5 cm | 18 Human Embryo 9 cm | 19 Human Embryo 10 cm | 20 Human Embryo 12 cm | 21 Human Embryo 12 cm | 22 Human Embryo 12 cm | 23 Human Embryo 12 cm Cord | 28 Fetus Five Months | 30 Ventral Heria | 31 Human Embryo 5.5 cm | 32 Term Human | 33 Term Human | [[Figures
Reference
Cullen TS. Embryology, anatomy, and diseases of the umbilicus together with diseases of the urachus. (1916) W. B. Saunders Company, Philadelphia And London.
Cite this page: Hill, M.A. (2024, June 25) Embryology Cullen1916 fig31.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Cullen1916_fig31.jpg
- © Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G
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