Which chamber pumps blood to the aorta?

• A. Right Ventricle
• B. Left Atrium
• C. Right Atrium
• D. Left Ventricle

Answer: (D)

The main idea is identifying which heart chamber supplies the aorta, the main artery of the systemic circulation. The blood that fills the aorta is oxygen-rich and needs to be pushed into the entire body at high pressure, which is provided by the chamber with the strongest pumping force—the left ventricle. It has thick muscular walls to generate that high pressure and connects to the aorta through the aortic valve, sending blood into the systemic circulation.

In contrast, the right ventricle delivers blood to the lungs via the pulmonary artery, the left atrium receives oxygenated blood from the lungs, and the right atrium collects blood returning from the body.