Left atrioventricular opening

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Left atrioventricular opening
Latin ostium atrioventriculare sinistrum
Gray's p.533
TA A12.1.04.002
FMA 9335
Anatomical terminology

The left atrioventricular opening (mitral orifice) is placed below and to the left of the aortic orifice.

It is a little smaller than the corresponding aperture of the opposite side.

It is surrounded by a dense fibrous ring, covered by the lining membrane of the heart, and is guarded by the bicuspid or mitral valve.


This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)

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