In the context of bone marrow function, which body system is responsible for producing red blood cells (erythrocytes)?

• A. Integumentary system (via the epidermis)
• B. Digestive system (via the small intestine)
• C. Skeletal system (via red bone marrow hematopoiesis)
• D. Nervous system (via the spinal cord)

Answer: (C)

Verified step by step guidance

1. Understand that red blood cells (erythrocytes) are produced through a process called hematopoiesis, which occurs in the bone marrow.
2. Identify that the bone marrow responsible for producing red blood cells is the red bone marrow, which is found within certain bones of the skeletal system.
3. Recognize that the skeletal system houses the red bone marrow, making it the body system responsible for erythrocyte production.
4. Note that other systems listed, such as the integumentary, digestive, and nervous systems, do not have a role in producing red blood cells.
5. Conclude that the correct answer is the skeletal system, specifically through the function of red bone marrow hematopoiesis.