Definition of Annulus

Reviewed on 3/29/2021

Annulus: A ringlike structure, or any body part that is shaped like a ring. Applied to many small ring-shaped structures.

The base of a heart valve that supports the valve's leaflets is called the annulus. A ring-shaped pancreas that encircles the duodenum is an annular pancreas.

"Annulus" is a misspelling of the Latin "anulus" (a little ring), the diminutive of the Latin "anus" (a ring of more substantial size).

QUESTION

In the U.S., 1 in every 4 deaths is caused by heart disease. See Answer

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