noun:a ring-shaped muscle that surrounds a body opening and that can tighten to close the opening
noun:an annular muscle surrounding and able to contract or close a bodily opening
Movie quotes
(..) Her shoulders were repeatedly displaced out of their socket. SAROYAN: There's something unusual in the upper esophageal sphincter. Let's see. HODGINS: It's some kind of key. EDISON: To what? (..)
