Sphincter
volume
British pronunciation/sfˈɪŋktɐ/
American pronunciation/ˈsfɪŋktɝ/

Definice a Význam "sphincter"

01

sfincter

(anatomy) a ring of muscle that can open or close an opening, such as anus, in the body

What is a "sphincter"?

A sphincter is a muscular structure found in various locations throughout the body. Sphincters are ring-like muscles that encircle and control the opening and closing of certain passages or orifices in the body. They act as valves, regulating the flow of substances through these openings. Sphincters are essential for maintaining proper control and coordination of bodily functions such as digestion, urination, defecation, and the control of blood flow. They provide a barrier between different regions of the body and help prevent the backward flow of fluids or substances. Sphincters can be voluntarily or involuntarily controlled, depending on their location and function. Their presence and proper functioning are crucial for the normal functioning and regulation of various physiological processes.

example
Příklad
examples
The urinary sphincter controls the flow of urine out of the bladder.
The lower esophageal sphincter (LES) is a ring of muscle at the bottom of the esophagus that opens to let food into the stomach and closes to prevent stomach acid from coming back up into the esophagus.
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