Let's Talk Birth and Baby - This really is an amazing picture of the inside of an umbilical cord. Showing clearly the two arteries and single vein. The cord gas three functions:
Umbilical Cord Keepsakes Are Going Viral
Umbilical cord anatomy hi-res stock photography and images - Alamy
Anatomy of Umbilical Cord. Two Umbilical Arteries and One Umbilical Vien Stock Illustration - Illustration of reproduction, abortion: 176551791
pregnancy - What happens to the umblical cord inside the mother? - Biology Stack Exchange
Umbilical Artery – Earth's Lab
Fetal Life-Support System American Pregnancy Association
Umbilical cord photos: Everything you need to know about this little cord | Kidspot
From Pregnancy to Birth: A Guide to Umbilical Cord Health