Which organ acts as a pump to send blood throughout the body?

• A. Liver
• B. Heart
• C. Lungs
• D. Kidneys

Answer: (B)

Blood circulation relies on a muscular pump—the heart. The heart contracts in a coordinated rhythm, pushing blood to the lungs for oxygenation and then out to the rest of the body, with valves that keep the flow moving in one direction. This pumping action creates the pressure that drives blood through all the vessels, delivering oxygen and nutrients where needed. Other organs have different roles: the liver processes nutrients and detoxifies the body, the lungs exchange gases but don’t push blood through the body, and the kidneys filter wastes and regulate fluids. So, the heart is the organ that acts as the pump to send blood throughout the body.