In the context of the skeleton, the production of blood cells (hematopoiesis) primarily occurs within which body system?

• A. Nervous system (spinal cord)
• B. Integumentary system (dermis)
• C. Muscular system (skeletal muscle fibers)
• D. Skeletal system (red bone marrow)

Answer: (D)

Verified step by step guidance

1. Identify the process described: hematopoiesis, which is the production of blood cells.
2. Recall that hematopoiesis primarily occurs in the red bone marrow, which is found within certain bones.
3. Understand that red bone marrow is a component of the skeletal system, specifically located inside the cavities of some bones.
4. Recognize that the other systems listed (nervous, integumentary, muscular) do not have the primary function of producing blood cells.
5. Conclude that the skeletal system, through its red bone marrow, is responsible for hematopoiesis.