Which term describes the underside of the heart that rests against the diaphragm?

Which term describes the underside of the heart that rests against the diaphragm?

• A. Diaphragmatic Surface of the Heart
• B. Lateral Surface of the Heart
• C. Posterior Surface of the Heart
• D. Anterior Surface of the Heart

Answer: (A)

The term described is the diaphragmatic surface of the heart. This is the inferior aspect of the heart that sits against the diaphragm, formed mainly by the left ventricle with some contribution from the right ventricle, and resting on the central tendon of the diaphragm in the upright position.

The other surfaces are oriented differently: the anterior (sternocostal) surface faces the sternum and ribs, while the posterior surface is the base formed largely by the left atrium and lies toward the vertebral column. The lateral surfaces run along the sides toward the lungs. So, the underside that contacts the diaphragm is best described as the diaphragmatic (inferior) surface.