The internal C-shaped crest of the right atrium which indicates the openings for the Superior vena cava and Inferior vena cava is

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The crista terminalis is the internal C-shaped crest of the right atrium which indicates the openings for the Superior vena cava and Inferior vena cava. The ligamentum arteriosum is a remnant of the fetal ductus arteriosus, the trabeculae carneae are irregular muscular ridges on the internal surface of the ventricles, and the pectinate muscles are muscular ridges found in the atria. The fossa ovalis is a depression in the interatrial septum that is a remnant of the fetal foramen ovale.

The Internal C-Shaped Crest of the Right Atrium Which Indicates