ostium arteriosum


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left atrioventricular orifice

[TA]
an atrioventricular opening that leads from the left atrium into the left ventricle of the heart.
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ostium arteriosum

The arterial orifice of the ventricle of the heart into the aorta or pulmonary artery.
See also: ostium
Medical Dictionary, © 2009 Farlex and Partners