"105252063"@en-us . . "sphincter muscle"@en-us . . "anatomical sphincter"@en-us . "05570839-n"^^ . . . "sphincter"@en-us . "a ring of muscle that contracts to close an opening"@en-us . . "a ring of muscle that contracts to close an opening"@en-us . . "0"^^ . "sphincter"^^ . . . . . "0"^^ . . . . . "105570839"^^ .