cloacal sphincter

cloacal sphincter

the developing muscle surrounding the caudal end of the cloaca is sometimes referred to as the cloacal sphincter; after division of the cloacal membrane by the urorectal septum, the dorsal part of the sphincter forms the external anal sphincter.
References in periodicals archive ?
The probe was lightly coated with room-temperature lubricating gel and inserted into the cloacal sphincter to a premeasured depth of 2 cm.
Androgen mediation of conditioned rhythmic cloacal sphincter movements in Japanese quail (Coturnix japonica).
The probe was inserted into the cloacal sphincter to a premeasured line at 2-cm depth, and body temperature was recorded at 30 seconds after insertion into the cloaca.
An open skin wound approximately 0.5 cm in diameter was present around the cloaca, extending through the cloacal sphincter. The entire area comprising the cloaca was swollen and reddened.