Left atrioventricular orifice - Ostium atrioventriculare sinistrum

Description

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, admitting only two fingers. 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 definition incorporates text from a public domain edition of Gray's Anatomy (20th U.S. edition of Gray's Anatomy of the Human Body, published in 1918 – from http://www.bartleby.com/107/).

Anatomical hierarchy

General Anatomy > Cardiovascular system > Heart > Left ventricle > Left atrioventricular orifice

Translations