sphincter Definition
a ring of muscle surrounding and serving to guard or close an opening or tube, such as the anus or the openings of the stomach.
Using sphincter: Examples
Take a moment to familiarize yourself with how "sphincter" can be used in various situations through the following examples!
Example
The sphincter muscle at the end of the esophagus prevents stomach acid from flowing back into the throat.
Example
The anal sphincter is responsible for controlling bowel movements.
sphincter Synonyms and Antonyms
Synonyms for sphincter
- valve
- constrictor
- muscle ring
Phrases with sphincter
the ring of muscle between the esophagus and stomach that prevents stomach contents from flowing back into the esophagus
Example
GERD occurs when the lower esophageal sphincter fails to close properly.
Example
Incontinence can occur when the urinary sphincter is weakened or damaged.
anal sphincter
the ring of muscle that surrounds the anus and controls bowel movements
Example
Damage to the anal sphincter can cause fecal incontinence.
Summary: sphincter in Brief
A 'sphincter' [sfɪŋktər] is a ring of muscle that surrounds and guards an opening or tube, such as the anus or the stomach. It serves to control the flow of substances through the opening or tube, as in the case of the lower esophageal sphincter, which prevents stomach acid from flowing back into the throat, or the anal sphincter, which controls bowel movements.
