Question

describe musculipectinati??​

Answer 1

Answer:

Behind the crest (crista terminalis) of the right atrium the internal surface is smooth. Pectinate muscles make up the part of the wall in front of this, the right atrial appendage.[citation needed]

In the left atrium, the pectinate muscles, fewer and smaller than in the right atrium, are confined to the inner surface of its atrial appendage. This is due to the embryological origin of the auricles, which are the true atria. Some sources cite that the pectinate muscles are useful in increasing the power of contraction without increasing heart mass substantially.[citation needed]

Pectinate muscles of the atria are different from the trabeculae carneae which are found on the inner walls of both ventricles.[citation needed] The pectinate muscles originate from the crista terminalis.[citation needed

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Answer 2

Answer:

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Explanation:

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. Behind the crest (crista terminalis) of the right atrium the internal surface is smooth.

What is the function of Musculi Pectinati?

Some sources cite that the pectinate muscles are useful in increasing the power of contraction without increasing heart mass substantially. Pectinate muscles of the atria are different from the trabeculae carneae which are found on the inner wmusculi pectinati (atria, anatomy) The musculi pectinati of the atria are internal muscular ridges generally on the anterolateral surface of the chambers. They are only present in the area derived from the embryological true atrium. In the right atrium, this is the area lateral to the crista terminalis.alls of both ventricles