The anal sphincter stops feces from falling out.
Yes, there are two anal sphincter muscles: the internal anal sphincter, which is made of smooth muscle and is under involuntary control, and the external anal sphincter, which is made of skeletal muscle and is under voluntary control.
The anal canal has a ring of muscle, called the anal sphincter
Anal Sphincter
You can imagine the situation, in which case the anal sphincter in involuntary. In that case you defecate with out your knowledge.
Anal sphincter.
The second type of sphincter is the internal anal sphincter, which is made up of smooth muscle and is not under voluntary control. It helps control the release of feces from the rectum into the anal canal.
The two anal sphincters are the internal anal sphincter, which is involuntary and made of smooth muscle, and the external anal sphincter, which is voluntary and made of skeletal muscle. Together, they help regulate the passage of feces during bowel movements.
The internal urethral sphincter an involuntary sphincter that keeps the urethra closed when urine is not being used. The external urethral sphincter is fashioned by skeletal muscles as the urethra passes thorugh the pelvic floor.This sphincter is voluntary controlled.
The anal sphincter and the bladder sphincter in potty trained children and in most other people whose spinal cords are intact or are not suffering from some diseases.
Assholicus Maximus & Buttockical Minimus
outer anal sphincter
SPHINCTER : the muscle that controls the anal opening, or more generally any tissue or muscle around the opening to an organ.