Conus arteriosus

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Conus arteriosus
Sternocostal surface of heart. (Conus arteriosus visible at top center.)
Gray's subject #138 531
Dorlands/Elsevier c_54/12257620

The conus arteriosus is a conical pouch formed from the upper and left angle of the right ventricle, from which the pulmonary artery arises.

A tendinous band, which may be named the tendon of the conus arteriosus, extends upward from the right atrioventricular fibrous ring and connects the posterior surface of the conus arteriosus to the aorta. This is also called the infundibulum, and it is the entrance from the right ventricle into the pulmonary artery and pulmonary trunk. The wall of the infundibulum is smooth.

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This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.