Conus arteriosus

Conus arteriosus
Conus arteriosus
Gray492.png
Sternocostal surface of heart. (Conus arteriosus visible at top center.)
Gray's subject #138 531

The conus arteriosus is a conical pouch formed from the upper and left angle of the right ventricle in the chordate heart, from which the pulmonary trunk 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. The conus arteriosus 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 As such, some of the information contained within it may be outdated.



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  • conus arteriosus — noun (plural coni arteriosi) Etymology: New Latin, literally, arterial cone Date: circa 1860 1. a conical prolongation of the right ventricle in mammals from which the pulmonary arteries emerge called also conus 2. a prolongation of the ventricle …   New Collegiate Dictionary

  • conus arteriosus — /koh neuhs ahr tear ee oh seuhs/, pl. coni arteriosi /koh nuy ahr tear ee oh suy, koh nee ahr tear ee oh see/. Anat., Zool. the most anterior part of the simple tubular heart of lower vertebrates and embryos of higher vertebrates, leading into… …   Universalium

  • conus arteriosus — co·nus ar·te·ri·o·sus kō nə sär .tir ē ō səs n, pl co·ni ar·te·ri·o·si .nī är .tir ē ō .sī, (.)nē a conical prolongation of the right ventricle from which the pulmonary arteries emerge called also conus * * * the front upper portion of the right… …   Medical dictionary

  • conus arteriosus — a chamber in the heart, q.v. It leads blood out of the heart to the ventral aorta …   Dictionary of ichthyology

  • conus arteriosus — the front upper portion of the right ventricle adjoining the pulmonary arteries …   The new mediacal dictionary

  • conus arteriosus — …   Useful english dictionary

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