Right atrioventricular orifice
- Right atrioventricular orifice
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| Right atrioventricular orifice |
 |
| Section of the heart showing the ventricular septum. (Right atrioventricular orifice visible at left, but not labeled.) |
| Latin |
ostium atrioventriculare dextrum |
| Gray's |
subject #138 531 |
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
- Left atrioventricular orifice
This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained within it may be outdated.
Categories:
- Cardiac anatomy
- Cardiovascular system stubs
Wikimedia Foundation.
2010.
Look at other dictionaries:
right atrioventricular orifice — ostium atrioventriculare dextrum … Medical dictionary
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Left atrioventricular opening — Latin ostium atrioventriculare sinistrum Gray s subject #139 533 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 … Wikipedia
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ostium atrioventriculare dextrum — [TA] right atrioventricular opening: the opening between the right atrium and the right ventricle of the heart, guarded by the right atrioventricular valve; called also tricuspid orifice and right atrioventricular orifice … Medical dictionary
valve — 1. A fold of the lining membrane of a canal or other hollow organ serving to retard or prevent a reflux of fluid. 2. Any formation or reduplication of tissue, or flaplike structure … Medical dictionary
human cardiovascular system — ▪ anatomy Introduction organ system that conveys blood through vessels to and from all parts of the body, carrying nutrients and oxygen to tissues and removing carbon dioxide and other wastes. It is a closed tubular system in which the… … Universalium
heart — A hollow muscular organ that receives the blood from the veins and propels it into the arteries. In mammals it is divided by a musculomembranous septum into two halves right or venous and left or arterial each of which consists of a receiving… … Medical dictionary
Bundle of His — Infobox Anatomy Name = Bundle of His Latin = fasciculus atrioventricularis GraySubject = GrayPage = Caption = Bundle of His is near ventricular septum. Caption2 = Heart cut away showing Bundle of HisSchematic representation of the… … Wikipedia
