Question

Name the ridged bundles of muscle found projecting inside the right atrium. View available hint(s) name the ridged bundles of muscle found projecting inside the right atrium. Trabeculae carneae papillary muscles pectinate muscles intercalated discs

Answer 1

Answer;

-Pectinate muscles

Explanation;

-Pectinate muscles are shaped a little like hair, and their function is maxium atrial contraction with minimal muscle mass.The pectinate muscles (musculi pectinati) are parallel ridges in the walls of the atria of the heart. They are so-called because of their resemblance to the teeth of a comb as in pecten.

-The pectinate muscles are ridge like elevations of muscle. They are parallel to each other and resemble teeth of a comb. They are easily observed inside the right atrium.