"a sphincter that is not recognizable at autopsy because its resting arrangement cannot be distinguished from adjacent tissue"@en-us . . . "104317239"@en-us . "0.125"^^ . "105252725"@en-us . "physiological sphincter"^^ . "0.25"^^ . "105571501"^^ . . . "05571501-n"^^ . . . . "physiological sphincter"@en-us . . . . .