A function of the papillary muscles is to _____ valves.
A)close the semilunar
B)prevent backward expulsion of the atrioventricular
C)close the atrioventricular
D)open the semilunar

Question

Quizplus · Accepted Answer

The papillary muscles are extensions of the myocardium that pull the cusps together and downward at the onset of ventricular contraction, thus preventing their backward expulsion into the atria.

A Function of the Papillary Muscles Is to _____ Valves