Which of the following is NOT a function of the cardiovascular system?

Which of the following is NOT a function of the cardiovascular system?

• A. Produces red blood cells
• B. Maintains homeostasis
• C. Regulates pH levels
• D. Transports oxygenated blood from lungs to rest of body

Answer: (A)

The main idea is understanding what the cardiovascular system actually does. Its primary job is to move blood through the body so tissues receive oxygen and nutrients and waste products are carried away. That circulation supports homeostasis by helping regulate blood pressure, temperature distribution, and acid–base balance through gas transport and the blood’s buffering capacity. Transporting oxygenated blood from the lungs to the rest of the body is a direct function, since the heart and vessels are built to deliver oxygen to tissues. Producing red blood cells, however, is not part of the cardiovascular system’s role; red blood cells are produced in the bone marrow as part of the hematopoietic system and then circulated by the cardiovascular system.

The main idea is understanding what the cardiovascular system actually does. Its primary job is to move blood through the body so tissues receive oxygen and nutrients and waste products are carried away. That circulation supports homeostasis by helping regulate blood pressure, temperature distribution, and acid–base balance through gas transport and the blood’s buffering capacity. Transporting oxygenated blood from the lungs to the rest of the body is a direct function, since the heart and vessels are built to deliver oxygen to tissues. Producing red blood cells, however, is not part of the cardiovascular system’s role; red blood cells are produced in the bone marrow as part of the hematopoietic system and then circulated by the cardiovascular system.