Right atrioventricular orifice

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Right atrioventricular orifice
Gray498.png
Section of the heart showing the ventricular septum. (Right atrioventricular orifice visible at left, but not labeled.)
Details
Latin ostium atrioventriculare dextrum
Identifiers
Gray's p.531
Dorlands
/Elsevier
o_09/12601882
TA A12.1.02.002
FMA FMA:9274
Anatomical terminology

The right atrioventricular orifice (right atrioventricular opening) is the large oval aperture of communication between the right atrium and ventricle.

Situated at the base of the atrium, it measures about 4 cm. in diameter and is surrounded by a fibrous ring, covered by the lining membrane of the heart; it is considerably larger than the corresponding aperture on the left side, being sufficient to admit the ends of four fingers.

It is guarded by the tricuspid valve.

See also[edit]

This article incorporates text from a public domain edition of Gray's Anatomy.