Contraction of the right ventricle supplies blood to the rest of the body.

• A. True
• B. False
• C. Not Sure
• D. Usually True

Answer: (B)

The right ventricle drives blood to the lungs, not to the rest of the body. It pumps through the pulmonary artery to the lungs for oxygenation, while the left ventricle is the one that sends oxygenated blood to the entire body via the aorta. The full flow is: right atrium → tricuspid valve → right ventricle → pulmonary valve → pulmonary artery → lungs; then oxygenated blood returns to the left atrium via the pulmonary veins, moves into the left ventricle, and is ejected into the aorta to supply the body. The right ventricle has a thinner wall and generates lower pressures suitable for the pulmonary circulation, whereas the left ventricle has a thick muscular wall to produce the high pressures needed for systemic circulation. Therefore, the statement is false.