Synonyms: Anus, Butt hole, Blow hole; on the opposite side of your body ; i.e. your backside; of your groin. Between the two "butt cheeks" , on the upper half of your legs.
Sphincters are muscular valves found throughout the body used to open or close an opening. An example is the cardiac sphincter which prevents food from coming back up the esop…hagus after swallowing (MORE)
The Rectal Sphincter/Anal Sphincter is an approximate 1 inch ring shaped muscle that surrounds the external opening of the rectum. This muscle maintains the natural function o…f the anal orifice/anal canal by constriction. This constriction relaxes as needed allowing for the body's normal physiological function. There are actually two sphincters at the anus, which effects and controls normal function; one is the internal anal sphincter, and the second is the external anal sphincter (rectal sphincter). These two muscles help regulate bowel function and movement; both are needed in order for the bowel to function normally and healthily. The internal anal sphincter is a smooth muscle in the lower part of the bowel, which keeps the anal canal closed until stool is ready to be passed; the external anal sphincter voluntarily contracts to prevent leakage, it acts much like a valve. This is the muscle that is referred to as the rectal sphincter, but without the two muscles working together, the bowel cannot function normally. Damage or disease to either of these sphincters can cause mild to serious problems, spotting or leaking fecal matter or full fecal incontinence. (MORE)
A sphincter is a circular muscle that constricts a natural body passage or orifice. There are over 50 sphincters in the human body, some of them microscopic. For example: … The pupillary sphincter is the iris in the eye. The anus has two sphincters; inner sphincter is involuntary and the outer is voluntary. (MORE)
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.
a ring of muscle that controls the release of an organs products. EXAMPLE: Pyloric Sphincter controls release of chyme. Cardiac Sphincter controls deposition of food into the… stomach from the esophagus. External Urethral Sphincter controls release of urine. External Anal Sphincter controls release of defecation. (MORE)
Sphincters can be classified into functional and anatomical sphincters: Anatomical sphincters have a localised and often circular muscle thickening to facilitate their actio…n as a sphincter. Functional sphincters do not have this localised muscle thickening and achieve their sphincteric action through muscle contraction around (extrinsic) or within (intrinsic) the structure. Sphincters can also be voluntarily or involuntarily controlled: Voluntary sphincters are supplied by somatic nerves . Involuntary sphincters are stimulated by autonomic nerves . (MORE)
A sphincter is a muscle that is formed in a circle and controls an opening, e.g., the lips and the anus. There are numerous sphincters within the body.