![A textbook of obstetrics . Becoming reducedto two arteries and a vein within the allantois itself, they con-stitute the vessels of the umbilical cord, which are destinedto carry the blood of the A textbook of obstetrics . Becoming reducedto two arteries and a vein within the allantois itself, they con-stitute the vessels of the umbilical cord, which are destinedto carry the blood of the](https://c8.alamy.com/comp/2ANBWTF/a-textbook-of-obstetrics-becoming-reducedto-two-arteries-and-a-vein-within-the-allantois-itself-they-con-stitute-the-vessels-of-the-umbilical-cord-which-are-destinedto-carry-the-blood-of-the-fetus-to-the-placenta-for-aeration-andnourishment-the-two-arteries-conveying-dark-venous-blood-the-vein-returning-bright-oxygenated-blood-resembling-in-thisrespect-the-pulmonary-arteries-and-vein-surrounding-the-blood-vessels-of-the-cord-is-a-peculiar-gelatinous-substance-furnishingthe-vessels-the-most-perfect-protection-possible-under-the-cir-cumstances-the-so-called-gelatin-of-wharton-deriv-2ANBWTF.jpg)
A textbook of obstetrics . Becoming reducedto two arteries and a vein within the allantois itself, they con-stitute the vessels of the umbilical cord, which are destinedto carry the blood of the
![The development, structure and blood flow within the umbilical cord with particular reference to the venous system - Spurway - 2012 - Australasian Journal of Ultrasound in Medicine - Wiley Online Library The development, structure and blood flow within the umbilical cord with particular reference to the venous system - Spurway - 2012 - Australasian Journal of Ultrasound in Medicine - Wiley Online Library](https://onlinelibrary.wiley.com/cms/asset/2fa1de85-171b-42b8-8a7f-1b4f19a0b0e8/ajum00013-fig-0001-m.jpg)
The development, structure and blood flow within the umbilical cord with particular reference to the venous system - Spurway - 2012 - Australasian Journal of Ultrasound in Medicine - Wiley Online Library
![Diagram of the abdomen in a human embryo at 4–5 weeks. Left-side view.... | Download Scientific Diagram Diagram of the abdomen in a human embryo at 4–5 weeks. Left-side view.... | Download Scientific Diagram](https://www.researchgate.net/publication/362787419/figure/fig1/AS:11431281085608420@1663811473189/Diagram-of-the-abdomen-in-a-human-embryo-at-4-5weeks-Left-side-view-The-umbilical-cord.png)