Question

Which of the following is not a part of the circulatory system?

• A. Heart
• B. Blood
• C. Blood vessels
• D. Kidney

Answer 1

The correct option is D

Kidney

The main organs which are involved in the circulatory system are blood vessels, blood and heart along with blood which it has to transport. Blood vessels consist of arteries and veins. Arteries carry oxygenated blood to different parts of the body whereas veins carry deoxygenated blood from different parts of the body to the heart. The kidney is an organ which filters out various wastes from the blood. So, it is a part of excretory system.