In adults, RBCs are formed in:
Correct answer: C. Bone marrow
- A. Liver
- B. Spleen
- C. Bone marrow
- D. Thymus
Explanation
The answer is bone marrow. In adults, red blood cells (RBCs) are formed in the red bone marrow of bones. The red bone marrow is a soft, spongy tissue that is found in the center of many bones. It is responsible for producing all of the blood cells in the body, including RBCs, white blood cells, and platelets.
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