what is ment by sphincter
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Explanation:
A sphincter is a circular muscle that normally maintains constriction of a natural body passage and which relaxes as required by normal physiological functioning.
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Answer:
n sphincter (anat) is a muscle which surrounds , and by its contraction tends to close , a natural opening. as the sphincter of the bladder , a sphincter of , pertaining to , or designating , a sphincter as a sphincter muscle.
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