For Sphincter we have terms and definitions in 12 topics. The topics are Bladder, Cancer, Dairy Production, Health, Horse Health, Incontinence, Liver, Biliary and Pancreatic Di, Medical, Multiple Sclerosis, Prostate Cancer, Science and Urology.

Sphincter (Bladder)

A ring of muscle around a natural opening or passage in the body that acts like a valve to control inflow or outflow; sphincter muscles keep the bladder closed until it is time to urinate

Sphincter (Cancer)

A ring-shaped muscle that relaxes or tightens to open or close a passage or opening in the body. Examples are the anal sphincter (around the opening of the anus) and the pyloric sphincter (at the lower opening of the stomach).

Sphincter (Dairy Production)

A ring-like muscle that maintains constriction of a bodily passage or orifice and opens upon relaxation.

Sphincter (Health)

Ring of muscle fibers located around an opening in the body that regulates the passage of substances through the opening

Sphincter (Horse Health)

Circular band or ring of muscle that serves to open or close a tube or orifice; analogous to a valve.

Sphincter (Incontinence)

Muscular structure that surrounds the urethra and allows the bladder to store or empty urine. This muscle is circular and acts like a valve, can relax or tighten to open or close the outlet of the bladder. The urethra has an internal and external sphincter. Internal sphincter is the portion of the urethra found at the bladder neck that keeps the urethra closed when a person is at rest. External sphincter is the portion of the urethra that is under a person's own control (voluntary control). The external sphincter is able top stop the flow of urine during voiding.

Sphincter (Liver, Biliary and Pancreatic Di)

Ring-like band of muscle that opens and closes an opening in the body.

Sphincter (Medical)

A ring of muscle fibers located around a naturally occurring passage or opening in the body that opens and closes to regulate passage of substances

Sphincter (Multiple Sclerosis)

A circular band of muscle fibers that tightens or closes a natural opening of the body, such as the external anal sphincter, which closes the anus, and the internal and external urinary sphincters, which close the urinary canal.

Sphincter (Prostate Cancer)

A muscle which surrounds, and by its contraction tends to close, a natural opening; as, the sphincter of the bladder

Sphincter (Science)

A circular muscle which when contracted closes off the passage of substances through a tube; such as in the intestinal tract; cardiac sphincter, phyloric sphincter and anal sphincter

Sphincter (Urology)

A ring of muscle fibers located around an opening in the body that regulates the passage of substances.

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