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.
Sphincter of Oddi.
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.
The anus is composed of two sphincter muscles: the inner sphincter, which is involuntary, and the external sphincter, which is under voluntary control.
Assholicus Maximus & Buttockical Minimus
Stomach and Duodenum
The medical term for circular muscle found in tubular structures that regulates the passage of substances is "sphincter." Sphincters act as valves to control the flow of fluids or materials through tubular structures in the body.
from the pyloric sphincter in the epigastric in the epigastric region to the ileocecal valve (sphincter) in the right iliac region where it joins the large intestine.
outer anal sphincter
ileocecal sphincter (valve)
cardiac sphincter; or gastroesophageal sphincter; or lower esophageal sphincter (LES); or esophageal sphincter from http://en.wikipedia.org/wiki/Cardia
The pyloric sphincter regulates passage of chymefrom the stomach
Sphincter of Oddi.
cardiac sphincter/lower esophageal sphincter (LES)
What is the function of the cardiac sphincter?
Not that sphincter but yes they do have one of their own.
esophagal sphinter is a sphincter is actullal found there end of esophagous,