Oxygenated blood from the placenta returns to the fetus in the
A) allantois.
B) umbilical vein.
C) umbilical arteries.
D) decidua capsularis.
E) umbilical capillaries.

Question

Quizplus · Accepted Answer

Oxygenated blood from the placenta travels through the umbilical vein and enters the fetus. The umbilical arteries carry deoxygenated blood back to the placenta. The allantois is a membrane that becomes part of the bladder in the fetus. The decidua capsularis is a part of the uterine lining that surrounds the embryo in the early stages of development. The umbilical capillaries are a network of blood vessels within the umbilical cord that allow for the exchange of nutrients and waste products between the fetus and the placenta.

Oxygenated Blood from the Placenta Returns to the Fetus in the