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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.
The crista terminalis provides the origin for the pectinate muscles. [citation needed] The sinoatrial node is located in the superior part of the crista terminalis at the junction of the right atrium, and superior vena cava. [2]: 60
The trabeculae carneae (columnae carneae or meaty ridges) are rounded or irregular muscular columns which project from the inner surface of the right and left ventricle of the heart. [1] These are different from the pectinate muscles, which are present in the atria of the heart. In development, trabeculae carneae are among the first of the ...
The venous component forms a large part of the posterior wall of the heart and the anterior wall of the oblique pericardial sinus. [19] The appendage of the left atrium is a narrow, finger-like entity that contains small pectinate muscles. Its small orifice lies anterior of the left superior pulmonary vein and lateral to the mitral valve.
The terminal sulcus is a groove on the outer surface of the right atrium of the heart marking the transition between the sinus venarum cavarum (which has a distinct embryological origin) and the rest of the right atrium (which features pectinate muscles on its inner surface).
The research, published in the European Heart Journal on Monday, found that women with high levels of intermuscular fat had an “especially high risk” of heart attack or failure, with every 1 ...
The sinus venarum (also known as the sinus of the vena cava, or sinus venarum cavarum [1]) is the portion of the right atrium in the adult human heart [2] where the inner surface [3] of the right atrium is smooth, [2] [3] whereas the rest of the inner surface is rough [3] (trabeculated [2]) due to the presence of pectinate muscles. [4]
Pectinate may refer to: Pectinate line, a line which divides the upper two thirds and lower third of the anal canal; Pectinate muscles, parallel ridges in the walls of the atria of the heart; A salt of the heteropolysaccharide pectin
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