Left atrioventricular orifice

Left atrioventricular orifice
Latin	ostium atrioventriculare sinistrum
Gray's	subject #139 533
Dorlands/Elsevier	o_09/12601891

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.

External links

• left+atrioventricular+orifice at eMedicine Dictionary

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.