The ________ is formed by a portion of the allantois,blood vessels,and remnants of the yolk sac.
A)amnion
B)body stalk
C)chorion
D)umbilical cord
E)placenta

Question

Quizplus · Accepted Answer

The umbilical cord is formed by a portion of the allantois, blood vessels (umbilical arteries and vein), and remnants of the yolk sac. The other choices are incorrect: the amnion is a thin membrane surrounding the fetus and filled with amniotic fluid, the body stalk (also known as umbilical stalk) connects the embryo to the developing placenta, the chorion is the outermost fetal membrane that encloses the amnion, and the placenta is an organ that develops during pregnancy and allows exchange of nutrients, gases, and waste products between the mother and fetus.

The ________ Is Formed by a Portion of the Allantois,blood