As defined on a Wikipedia page, what is the name for a "circular muscle that normally maintains constriction of a natural body passage and which relaxes as required by normal physiological functioning"?

The most commonly referenced sphincter in the human body is the anus, which of course has a whole host of other colorful nicknames. Other sphincters include the esophageal sphincter, the gastroesophageal junction, the antroduodenal junction, and the ileocecal junction.

Asked by Tom Cohen · Last updated 5 years ago · 62.2K views