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[koh-nuh s ahr-teer-ee-oh-suh s] /ˈkoʊ nəs ɑrˌtɪər iˈoʊ səs/

noun, plural coni arteriosi
[koh-nahy ahr-teer-ee-oh-sahy, koh-nee ahr-teer-ee-oh-see] /ˈkoʊ naɪ ɑrˌtɪər iˈoʊ saɪ, ˈkoʊ ni ɑrˌtɪər iˈoʊ si/ (Show IPA). 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.

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


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