The document describes the anatomical structures of the umbilical cord, including the covering epithelium, Wharton's jelly, blood vessels consisting of one vein and two arteries after the fourth month of gestation, remnants of the yolk sac and its vitelline duct, the allantois connecting to the fetal bladder, and the obliterated extraamniotic coelom.

61.  Covering epithelium
 Wharton’s jelly
 Blood vessels – 1 vein and 2 arteries after 4th
month
 Remnants of yolk sac and its vitelline duct
 Allantois: blunt end at fetal part continuing
with fetal bladder
 Obliterated extraamniotic coelom