Question

What do understand by a sphincter?

Answer 1

A sphincter is a circular muscle that normally maintains constriction of a natural body passage or orifice and which relaxes as required by normal physiological functioning. Sphincters are found in many animals.

Answer 2

Answer:

A ring of muscle surrounding and serving to guard or close an opening or tube, such as the anus or the openings of the stomach.

MARK ME AS BRAINLIEST !!