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| a hollow space within the body, an organ or a bone |
| either of the two pairs of folds of mucous membrane projecting into the cavity of the larynx |
tricuspid valve n.
The three-segmented valve of the heart that keeps blood in the right ventricle from flowing back into the right atrium. Also called right atrioventricular valve.
| tricuspid valve
A valve of the heart, usually having three cusps, that is located between the right atrium and right ventricle. The tricuspid valve prevents the backflow of blood to the right atrium. |