conus-arteriosus

conus arteriosus

[koh-nuhs ahr-teer-ee-oh-suhs]
noun, plural coni arteriosi [koh-nahy ahr-teer-ee-oh-sahy, koh-nee ahr-teer-ee-oh-see] . Anatomy, Zoology.
the most anterior part of the simple tubular heart of lower vertebrates and embryos of higher vertebrates, leading into the artery that leaves the heart; in mammals it forms a part of the upper wall of the right ventricle, in which the pulmonary artery originates.
Also called conus.


Origin:
1855–60; < Neo-Latin: literally, arterial cone. See arterio-, cone

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Medical Dictionary

conus arteriosus conus ar·te·ri·o·sus (är-tēr'ē-ō'səs)
n.
A conical extension of the right ventricle in the heart, from which the pulmonary artery originates. Also called arterial cone, infundibulum.

The American Heritage® Stedman's Medical Dictionary
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