Right atrioventricular orifice

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.

单词	Ostium atrioventriculare dextrum
释义	Ostium atrioventriculare dextrum 英语百科 Right atrioventricular orifice 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.
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Ostium atrioventriculare dextrum

Right atrioventricular orifice