Parietal cusp
Cuspis parietalis
- Synonym: Lateral leaflet of tricuspid valve; Right cusp
- Related terms: Parietal cusp of tricuspid valve
Definition
The right atrioventricular valve (Tricuspid valve) typically has three principal cusps in some domestic animals (Horses...) and humans, hence the name “tricuspid”:
Septal cusp (attached to the interventricular septum)
Parietal (mural) cusp (attached to the right ventricular free wall)
Angular cusp (between septal and parietal cusps)
However, the number and distinctness of cusps may vary slightly between species. In some animals, the cusps are less distinctly separated and may appear as two large cusps with subdivisions, like in dogs and cats (a septal and a parietal cusp).
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