Question

Blood cell formation in adults occurs primarily in:
a. red bone marrow
b. yellow bone marrow
c. the spleen
d. the kidneys
e. the liver

Answer 1

Answer: a. red bone marrow

Explanation:

In early human life that is embryo, the site for the synthesis of the blood is the yolk sac. Then in the entire embryonic life, the liver becomes the site of blood cell synthesis, then the red bone marrow becomes the site for the synthesis of red blood cells as well as the granulocytes in the adult life.