The primary site of hematopoiesis in a 4-month-old maturing fetus is:
A) The liver
B) The spleen
C) The bone marrow
D) A lymph node

Name: The primary site of hematopoiesis in a 4-month-old maturing fetus is: A) The liver B) The spleen C) The bone marrow D) A lymph node
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In a 4-month-old fetus, the primary site of hematopoiesis is the liver. Later in development, around 6 months, hematopoiesis shifts to the bone marrow. The spleen and lymph nodes do have some hematopoietic activity, but it is secondary.

The Primary Site of Hematopoiesis in a 4-Month-Old Maturing Fetus