Trabeculae Carneae are muscular ridges located in which chamber of the heart?

• A. Left Pulmonary Artery
• B. Left Common Carotid Artery
• C. Trabeculae Carneae
• D. Right Ventricle

Answer: (D)

Trabeculae carneae are muscular ridges lining the inner walls of the ventricles. They help to maintain ventricular wall shape during contraction, prevent suction that could cause the walls to collapse, and provide attachment points for papillary muscles that support the heart valves. The right ventricle is particularly noted for a pronounced trabeculated inner surface and includes the moderator band, which carries part of the conduction system. Because the question asks which chamber contains these ridges, the right ventricle is the best choice, recognizing that both ventricles have trabeculae carneae but the right ventricle is especially characteristic. The other options are vessels or the term itself, not a heart chamber.