Which blood vessel brings deoxygenated blood back to the heart?

Which blood vessel brings deoxygenated blood back to the heart?

• A. Vein
• B. Artery
• C. Capillary
• D. Aorta

Answer: (A)

Veins are responsible for carrying deoxygenated blood back to the heart. After oxygen is delivered to the tissues via the arteries, the now deoxygenated blood enters small vessels called venules and then progressively larger veins, eventually returning to the heart. The structure of veins, which have thinner walls compared to arteries and often contain valves, assists in this return flow against gravity, especially from the lower parts of the body. The heart then pumps this deoxygenated blood to the lungs through the pulmonary arteries to be reoxygenated. Understanding the role of veins is fundamental in grasping how blood circulation operates in the body.

Veins are responsible for carrying deoxygenated blood back to the heart. After oxygen is delivered to the tissues via the arteries, the now deoxygenated blood enters small vessels called venules and then progressively larger veins, eventually returning to the heart.

The structure of veins, which have thinner walls compared to arteries and often contain valves, assists in this return flow against gravity, especially from the lower parts of the body. The heart then pumps this deoxygenated blood to the lungs through the pulmonary arteries to be reoxygenated. Understanding the role of veins is fundamental in grasping how blood circulation operates in the body.