conus arteriosus

 [koh-nuhs ahr-teer-ee-oh-suhs]  

co·nus ar·te·ri·o·sus

   [koh-nuhs ahr-teer-ee-oh-suhs]
noun, plural co·ni ar·te·ri·o·si  [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 co·nus.

Origin:
1855–60; < Neo-Latin: literally, arterial cone. See arterio-, cone
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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Conus arteriosus is always a great word to know.
So is extrinsic. Does it mean:
originating outside the anatomical limits of certain muscles or nerves
the transparent anterior part of the external coat of the eye covering the iris and the pupil and continuous with the sclera
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American Heritage
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
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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