In human development,the ______ is the site of early blood cell formation for the fetus.
A)umbilical cord
B)placenta
C)amniotic fluid
D)yolk sac
E)allantois

Question

Quizplus · Accepted Answer

The yolk sac is the first site of blood cell formation in human development. It forms during embryonic development and produces blood cells until the liver and spleen take over this function later on in development. The umbilical cord connects the fetus to the placenta, which provides oxygen and nutrients to the fetus. The amniotic fluid surrounds the fetus and provides protection. The allantois is a sac-like structure that forms part of the umbilical cord and helps with waste removal.

In Human Development,the ______ Is the Site of Early Blood