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A muscle sphincter is a band of tissue that contracts. The body has several muscle sphincters. Sphincters control back flow of acids and food from the stomach into the esophagus, and the contents of the small intestine from backing up into the stomach. The bladder sphincter controls holding and releasing urine, but helps to prevent bacteria from getting into the bladder. The anal sphincter controls elimination so we don't lose bowel movement in the wrong place or at the wrong time. Though each sphincter is strong, some conditions can wear down the effectiveness of this tissue band. Hiatal hernia can let stomach acids into the esophagus. The urinary sphincter can weaken with pregnancy, obesity, diuretics, and aging. Obesity, overuse of enemas or laxatives, anal sex, and aging can weaken the anal sphincter.
Note: No organ is a muscle sphincter, but some organs have muscle sphincters. The main organs that have muscle sphincters are ones that fluid/contents can move in two directions, in and out, and serve to protect those organs from damage. So for example, the bladder is smooth muscle and as an organ has a urinary sphincter.
What else can I help you with?
What muscle does the esophagus pass through to reach the stomach?
The lower esophageal sphincter muscle/the cardiac sphincter muscle.
What kind of muscle is the orbicularis oculi and orbicularis oris in terms of function?
Sphincter Muscle
Is duodenum a sphincter muscle?
no
What is the muscle that controls the urethra?
The muscle called the urethral sphincter muscle is what constricts in the urethra. The urethral orifice is what is actually constricted by the urethral sphincter.
How long does it take for the sphincter muscle to close in cows?
This depends on what sphnicter muscle you are talking about, because there is more than one sphincter muscle in a cow.
What is the sphincter muscle that connects the stomach to the small intestine?
ileocecal sphincter (valve)
Ring of muscle in the stomach?
The ring of muscle at the entrance to the stomach is the lower esophageal sphincter. This muscle is normally contracted to close the esophagus. At the lower end of the stomach food passes through the pyloric sphincter and into the duodenum of the small intestine.
Are there 2 anal sphincter muscles?
Yes, there are two anal sphincter muscles: the internal anal sphincter, which is made of smooth muscle and is under involuntary control, and the external anal sphincter, which is made of skeletal muscle and is under voluntary control.
The sphincter muscle that controls access to the stomach from the esophagus is called?
cardiac sphincter; or gastroesophageal sphincter; or lower esophageal sphincter (LES); or esophageal sphincter from http://en.wikipedia.org/wiki/Cardia
Are there exercises that can strengthen the anus sphincter muscle?
how to strengthen the splincter muscle ?
A muscle that forms a tight band?
Sphincter
How do you stretch sphincter muscle?
by doing excercise
