Thick Projections of Muscle in the Ventricles That Anchor Chordae

Question

Thick projections of muscle in the ventricles that anchor chordae tendineae are called
A) pectinate muscles.
B) conus arteriosus.
C) papillary muscles.
D) trabeculae carneae.
E) auricles.

Accepted Answer

Papillary muscles are thick projections of muscle found in the ventricles of the heart. They anchor the chordae tendineae that attach to the atrioventricular valves (i.e. the mitral and tricuspid valves) and prevent them from inverting into the atria during ventricular contraction.