Where are blood cells produced during fetal development?
a. bone marrow c. liver and spleen
b. stem cells d. heart and lungs
C
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A Incorrect. After birth, blood cells are produced in the bone marrow, but not during fetal development.
B Incorrect. After birth, blood cells are produced from stem cells in the bone marrow, but not during fetal development.
C Correct. During fetal development blood cells are produced in the liver and the spleen.
D Incorrect. Blood cells are never produced in the heart and lungs.
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