True about umbilical cord: (A) Contains 2 umbilcal veins, (B) Contains 1 umbilical aery, (C) Right umbilical vein disappear, (D) Length is 25 - 30 cms
Answer is C. Right umbilical vein regresses and left umbilical vein is left, umbilical cord has two umbilical aeries and the left umbilical vein. An average umbilical cord is 55cm long with a diameter of 1-2 cm and 11helices Ref: Gray's 39e/p-210-220