In adults, most bone marrow in the long bones of the extremities contains:
A. fat.
B. endosteum.
C. leukocytes.
D. red blood cells.
Ans: A. fat.
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The endoderm does not give rise to which of the following structures?
A. The lining of the respiratory tract B. The thymus C. The thyroid gland D. The blood E. The lining of the digestive tract
Delivering a baby
A) Negative feedback B) Positive feedback