The primary nutrient source for early embryonic development that later becomes an important site for bloodformation is the
A) amniotic fluid.
B) placenta.
C) basal decidua.
D) umbilical vein.
E) yolk sac.

Question

Quizplus · Accepted Answer

The yolk sac is the primary nutrient source for early embryonic development and also becomes an important site for blood formation. The amniotic fluid, placenta, basal decidua, and umbilical vein also play important roles during fetal development, but they do not serve the same functions as the yolk sac in early embryonic development.

The Primary Nutrient Source for Early Embryonic Development That Later