Papillary muscle
The papillary muscles are muscles located in the ventricles of the heart. They attach to the cusps of the atrioventricular valves (also known as the mitral and tricuspid valves) via the chordae tendineae and contract to prevent inversion or prolapse of these valves on systole (or ventricular contraction).
| Papillary muscle | |
|---|---|
Interior of right side of heart. Papillary muscles labeled in purple. | |
Diagram showing relations of opened heart to front of thoracic wall. Ant. Anterior segment of tricuspid valve. A O. Aorta. A.P. Anterior papillary muscle. In. Brachiocephalic artery (Innominate). L.C.C. Left common carotid artery. L.S. Left subclavian artery. L.V. Left ventricle. P.A. Pulmonary artery. R.A. Right atrium. R.V. Right ventricle. V.S. Ventricular septum. | |
| Details | |
| Identifiers | |
| Latin | musculus papillaris |
| MeSH | D010210 |
| TA98 | A12.1.00.022 |
| TA2 | 4043, 4066 |
| FMA | 12154 |
| Anatomical terms of muscle | |
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