Muscle encircling the anus, automatically controls passage of gas and feces
The circular band or ring of muscle that controls the release of feces from the anus.
Circular muscles that allow waste materials to pass through the anal opening. When the anal sphincter contracts, it closes the opening. The anal sphincter has two muscles – internal and external. Both muscles work to maintain bowel control.
external and internal anal muscles that prevent stool from leaving the rectum
Circular muscles that, when relaxed, allow waste materials to pass through the anal opening and, when contracted, close the opening.
the sphincter muscle of the anus
the rings of muscle around the anus that give bowel control.
the muscles surrounding the anus that are able to contract or close the opening / anus
Two rings of muscles surrounding the rectum and anus which help to control passage of bowel movements.
valvelike muscle that keeps the anus closed except during defecation
a series of circular muscles, the majority of which are under voluntary control, which prevent the release of gas or stool from the anus.
he ci rcular band or ring of muscle that controls the release of feces from the anus
A muscular portion of the anal canal that controls the flow of stool from the body.
a ring of muscle fibres at the opening of the rectum, controlling the opening and closing of the anus
