What is the role of the heart in circulation?

• A. Digest food
• B. Filter blood
• C. Pumps blood around the body
• D. Store minerals

Answer: (C)

Pumping blood around the body is the heart’s main role in circulation. The heart acts as a muscular pump that moves blood through the circulatory system, keeping it flowing to all tissues. With each beat, it pushes deoxygenated blood to the lungs to pick up oxygen and release carbon dioxide, then receives oxygenated blood and sends it out to the rest of the body. This continuous pumping maintains the pressure and flow needed for oxygen and nutrients to reach cells and for wastes to be carried away. Digestion is carried out by the digestive system, filtering blood is the job of organs like the kidneys (and liver in processing), and storing minerals is a function mainly of bones and other tissues, not the heart.