What does the term cardiovascular refer to?

• A. Relating to the heart and blood vessels.
• B. Relating to the brain and spinal cord.
• C. Relating to the lungs and airways.
• D. Relating to the stomach and intestines.

Answer: (A)

Cardiovascular refers to the heart and blood vessels. “Cardio” signals the heart, while “vascular” relates to vessels, and together they describe the system that moves blood through the body. This circulatory network includes the heart as the pump and arteries, veins, and capillaries as the pathways that carry blood to tissues and back to the heart, delivering oxygen and nutrients and removing wastes. The other options point to different body systems—nervous (brain and spinal cord), respiratory (lungs and airways), and digestive (stomach and intestines)—so they don’t fit the meaning of cardiovascular.