Urethral sphincter. The urethral sphincter is one of two muscles used to control the exit of urine in the urinary bladder through the urethra. The two muscles are the male or female external urethral sphincter and the internal urethral sphincter.When either of these muscles contracts, the urethra is sealed shut.The external urethral sphincter originates at the ischiopubic ramus and inserts into the intermeshing muscle fibers from the other side.he two muscles are the male or female external urethral sphincter and the internal urethral sphincter. When either of these muscles contracts, the urethra is sealed shut. The external urethral sphincter originates at the ischiopubic ramus and inserts into the intermeshing muscle fibers from the other side.
https://en.wikipedia.org/wiki/Urethral_sphincter
The urethral sphincter is one of two muscles used to control the exit of urine in the urinary bladder through the urethra.The two muscles are the male or female external urethral sphincter and the internal urethral sphincter.When either of these muscles contracts, the urethra is sealed shut. The external urethral sphincter originates at the ischiopubic ramus and inserts into the intermeshing muscle fibers from the other side.he two muscles are the male or female external urethral sphincter and the internal urethral sphincter. When either of these muscles contracts, the urethra is sealed shut. The external urethral sphincter originates at the ischiopubic ramus and inserts into the intermeshing muscle fibers from the other side.
https://en.wikipedia.org/wiki/Urethral_sphincter
Pyloric Sphincter. The pyloric sphincter is a band of smooth muscle at the junction between the pylorus of the stomach and the duodenum of the small intestine. It plays an important role in digestion, where it acts as a valve to controls the flow of partially digested food from the stomach to the small intestine.he pyloric sphincter prevents the regurgitation of chyme from the duodenum into the stomach. It also controls the flow of chyme into the intestine, which provides the intestines with a manageable volume of chyme from which to absorb nutrients.
http://www.innerbody.com/image_dige02/dige22.html
The pyloric sphincter is a band of smooth muscle at the junction between the pylorus of the stomach and the duodenum of the small intestine.It plays an important role in digestion, where it acts as a valve to controls the flow of partially digested food from the stomach to the small intestine.he pyloric sphincter prevents the regurgitation of chyme from the duodenum into the stomach. It also controls the flow of chyme into the intestine, which provides the intestines with a manageable volume of chyme from which to absorb nutrients.
http://www.innerbody.com/image_dige02/dige22.html
A sphincter is a muscle that surrounds a body opening (the urethra or the anus, for example) and which should unconsciously remained tightly closed.During urination, sphincters relax and open when messages are relayed from your nerves and your brain to the pelvic floor muscles. sphincter is a muscle that surrounds a body opening (the urethra or the anus, for example) and which should unconsciously remained tightly closed.
https://www.sharecare.com/health/healthy-kidney-and-urinary-system/role-sphincter-muscles-have-in-urination
Anatomy. The pyloric sphincter is a thin, circular band of visceral muscle surrounding the pyloric opening at the inferior end of the stomach. It is found at the border of the stomach’s final segment, the pylorus, and the small intestine’s first segment, the duodenum....he pyloric sphincter prevents the regurgitation of chyme from the duodenum into the stomach. It also controls the flow of chyme into the intestine, which provides the intestines with a manageable volume of chyme from which to absorb nutrients.
http://www.innerbody.com/image_dige02/dige22.html
During contraction of sphincter/circular muscles, the lumen associated with the sphincter constricts (closes). This constriction is caused from the shortening of the sphincter muscle. While relaxation of a sphincter muscle causes the lumen to open, which is caused by the lengthening of the associated sphincter muscle.phincters prove effective in the mediation of the entrance or release of liquids and solids; this is evident, for example, in the blowholes of numerous marine mammals. Many sphincters are used every day in the normal course of digestion and vision.
https://en.wikipedia.org/wiki/Sphincter
sphincter muscle a ringlike muscle that closes a natural orifice; called also sphincter. synergic m's (synergistic m's) those that assist one another in action.thenar m's the abductor and flexor muscles of the thumb. See appendix 3-4. triangular muscle a muscle that is triangular in shape.phincter muscle a ringlike muscle that closes a natural orifice; called also sphincter. synergic m's (synergistic m's) those that assist one another in action.
http://medical-dictionary.thefreedictionary.com/sphincter+muscle
A sphincter is a muscle (usually round) that can open and close. When it’s working properly, the sphincter of Oddi opens to allow bile and pancreatic juice to flow through and then closes again. However, in a condition called sphincter of Oddi dysfunction, the sphincter muscle does not open when it should.This prevents the bile and pancreatic juice from flowing through and causes a backup of digestive juices. The backup can cause bouts of severe pain in the abdomen.owever, in a condition called sphincter of Oddi dysfunction, the sphincter muscle does not open when it should. This prevents the bile and pancreatic juice from flowing through and causes a backup of digestive juices. The backup can cause bouts of severe pain in the abdomen.
http://my.clevelandclinic.org/health/diseases_conditions/hic_gastrointestinal_disorders/hic-sphincter-of-oddi-dysfunction
anal sphincter, sphincter a´ni sphincter muscle of anus (external or internal). cardiac sphincter, cardioesophageal sphincter muscle fibers about the opening of the esophagus into the stomach. external sphincter of female urethra external sphincter muscle of female urethra.external sphincter of male urethra external sphincter muscle of male urethra.ardiac sphincter a sphincter between the esophagus and the stomach, opening at the approach of food that can then be swept into the stomach by rhythmic peristaltic waves. sphincter of Oddi a sheath of muscle fibers investing the associated bile and pancreatic passages as they traverse the wall of the duodenum.
http://medical-dictionary.thefreedictionary.com/sphincter
what is a sphincter muscle used for
A sphincter muscle is used for digestion and vision. Sphincters are used every day in the normal course of digestion and vision.