| 释义 |
sphincter
sphinc·ter S0634100 (sfĭngk′tər)n. A ringlike muscle that normally maintains constriction of a body passage or orifice and that relaxes as required by normal physiological functioning.
[Late Latin sphinctēr, from Greek sphinktēr, from sphingein, to bind tight.]
sphinc′ter·al adj.sphincter (ˈsfɪŋktə) n (Anatomy) anatomy a ring of muscle surrounding the opening of a hollow organ or body and contracting to close it[C16: from Late Latin, from Greek sphinkter, from sphingein to grip tightly] ˈsphincteral adjsphinc•ter (ˈsfɪŋk tər)
n. a circular band of voluntary or involuntary muscle that encircles and closes an orifice of the body or one of its hollow organs. [1570–80; < Late Latin < Greek sphinktḗr=sphing-, base of sphíngein to hold tight + -tēr agent suffix] sphinc′ter•al, adj. sphinc·ter (sfĭngk′tər) A ring-shaped muscle that encircles an opening or passage in the body. Contraction and relaxation of a sphincter closes and opens the passage.sphincterA ring-shaped muscle that contracts to close an orifice.Thesaurus| Noun | 1. | sphincter - a ring of muscle that contracts to close an openinganatomical sphincter, sphincter musclemuscle, musculus - one of the contractile organs of the bodyphysiological sphincter - a sphincter that is not recognizable at autopsy because its resting arrangement cannot be distinguished from adjacent tissueanal sphincter, musculus sphincter ani, sphincter ani - the sphincter muscle of the anusmusculus sphincter urethrae, urethral sphincter - a striated sphincter muscle that constricts the urethrabladder sphincter, musculus sphincter vesicae - the sphincter muscle of the urinary bladder; made up of a thickened muscular layer of bladder around the urethral openingmusculus sphincter ductus choledochi - the smooth muscle sphincter of the common bile ductmusculus sphincter ductus pancreatici - the smooth muscle sphincter of the main pancreatic ductmusculus sphincter pupillae, pupillary sphincter - a ring of smooth muscle surrounding the irismusculus sphincter pylori, pyloric sphincter, pyloric valve - the sphincter muscle of the pylorus that separates the stomach from the duodenum |
Translationssphinctersfintereсфинктерsphincter
sphincter Anatomy a ring of muscle surrounding the opening of a hollow organ or body and contracting to close it Sphincter a ringlike muscle that constricts to close a natural orifice such as the oral or anal opening, or to narrow the passage from one part of a hollow tubular organ to another, for example, from the stomach and bile duct to the duodenum and from the bladder to the urethra. The sphincter is always in a tonic state. The orbicular muscle of the iris is a sphincter. Some sphincters consist of striated muscle and others of smooth muscle innervated by the autonomic nervous system. sphincter[′sfiŋk·tər] (anatomy) A muscle that surrounds and functions to close an orifice. sphincter
sphincter [sfingk´ter] a circular muscle that constricts a passage or closes a natural orifice. When relaxed, a sphincter allows materials to pass through the opening. When contracted, it closes the opening. Four main sphincter muscles along the alimentary canal aid in digestion: the sphincter" >cardiac sphincter, the sphincter" >pyloric sphincter, and two sphincters" >anal sphincters. Other sphincters are found in the iris of the eye, the bile duct (sphincter of Oddi" >sphincter of Oddi), the urinary tract, and elsewhere.anal sphincter (sphincter a´ni) either of two sphincters (the internal and external anal sphincters) that open and close to control evacuation of feces from the anus.cardiac 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.pyloric sphincter a sphincter at the opening from the stomach into the duodenum; it is usually closed, opening only for a moment when a peristaltic wave passes over it.urinary sphincter, artificial a fluid-filled system that surrounds the urethra with a silicone cuff that functions as a sphincter; a pump is in the scrotum and a fluid reservoir is in the abdomen. For urination, the pump's release valve is squeezed to allow the fluid to leave the urethral cuff and return to the reservoir; after urination is complete, the pump is squeezed and the fluid returns to the cuff to occlude the urethra.sphinc·ter (sfingk'tĕr), [TA] A muscle that encircles a duct, tube, or orifice in such a way that its contraction constricts the lumen or orifice. Synonym(s): musculus sphincter [TA], sphincter muscle [TA] [G. sphinktēr, a band or lace] sphincter (sfĭngk′tər)n. A ringlike muscle that normally maintains constriction of a body passage or orifice and that relaxes as required by normal physiological functioning.
sphinc′ter·al adj.sphinc·ter (sfingk'tĕr) [TA] A muscle that encircles a duct, tube, or orifice in such a way that its contraction constricts the lumen or orifice; it is the closing component of a pylorus (the outer component is the musculus dilatator).
Synonym(s): sphincter muscle. [G. sphinktēr, a band or lace]sphincter A muscle ring, or local thickening of the muscle coat, surrounding a tubular passage or opening in the body. When a sphincter contracts it narrows or closes off the passageway.sphincter a ring of muscle surrounding a tube or the opening to a tube that controls the size of the aperture it surrounds and, thus, the movement through the tube;examples are pyloric and anal sphincters.Sphincter muscles are unusual in that they are normally contracted and only occasionally relax.SphincterA circular band of muscle that surrounds and encloses an opening to the body or to one of its hollow organs. Damage to the sphincter surrounding the anus can cause fecal incontinence.Mentioned in: Cystometry, External Sphincter Electromyography, Fecal Incontinence, Neurogenic Bladder, Overactive Bladder, Paruresissphinc·ter (sfingk'tĕr) [TA] Muscle that encircles a duct, tube, or orifice in such a way that its contraction constricts the lumen or orifice. [G. sphinktēr, a band or lace]sphincter
Related to sphincter: sphincter muscle, Sphincter of Oddi, sphincterotomy, sphincter spasm, Esophageal sphincterSynonyms for sphincternoun a ring of muscle that contracts to close an openingSynonyms- anatomical sphincter
- sphincter muscle
Related Words- muscle
- musculus
- physiological sphincter
- anal sphincter
- musculus sphincter ani
- sphincter ani
- musculus sphincter urethrae
- urethral sphincter
- bladder sphincter
- musculus sphincter vesicae
- musculus sphincter ductus choledochi
- musculus sphincter ductus pancreatici
- musculus sphincter pupillae
- pupillary sphincter
- musculus sphincter pylori
- pyloric sphincter
- pyloric valve
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