Answer:
Bone Marrow, Blood Cells, and the Lymphoid/Lymphatic System
Explanation:
Structure and Function
Hematopoiesis, from haima (Gr., blood) and poiein (Gr., to make), is the production of blood cells, including erythrocytes, leukocytes, and platelets. Also known as hemopoiesis, hematopoiesis first occurs in the blood islands of the yolk sac and then transitions to the liver and spleen during gestation. After birth the primary hematopoietic site is the central cavities of bone, termed bone marrow. Hematopoiesis occurring elsewhere is called extramedullary hematopoiesis (EMH), which is most common in the spleen.
