sphincter
Kelime Anlamı :
1. büzgen.
2. büzücü kas.
3. sfinkter.
4. Vücuttaki boşluk veya kanalların ağızlarını büzmeğe yarayan halka biçimi kaslar, büzgen kas, sfinkter, muscluus sphincter.
5. büzgen kas.
6. i., anat. büzgen.
Tanımlar :
1.
A ringlike muscle that normally maintains constriction of a body passage or orifice and that relaxes as required by normal physiological functioning.
from The American Heritage® Dictionary of the English Language, 4th Edition
1.
A ringlike band of muscle that surrounds a bodily opening, constricting and relaxing as required for normal physiological functioning.
from Wiktionary, Creative Commons Attribution/Share-Alike License
1.
of, pertaining to, or designating, a sphincter.
2. A muscle which surrounds, and by its contraction tends to close, a natural opening.
2. A muscle which surrounds, and by its contraction tends to close, a natural opening.
from the GNU version of the Collaborative International Dictionary of English
1.
an orbicular, circular, or annular muscle surrounding and capable of closing a natural orifice or passage of the body.
2. the sphincter ani proper, sphincter externus, or external sphincter is a thin, flat plane of voluntary muscular fibers supplied by hemorrhoidal branches of nerves from the sacral plexus, surrounding the anus, subcutaneous and intimately adherent to the integument, of elliptical form 3 or 4 inches in long diameter, and an inch wide across. it arises from the tip of the coccyx, and is inserted into the tendinous raphe of the perineum. like most sphincters. it consists of symmetrical lateral halves united by a raphe in front of and behind the opening it incloses.
3. the sphincter recti, sphincter internus, or internal sphincter surrounds the lower end of the rectum, forming a muscular ring about an inch in extent and a quarter of an inch thick, and consists of an aggregation and thickening of the circular fibers of the gut. this sphincter is involuntary, and in health maintains its tonic contractility, which yields by reflex action to the pressure of the contents of the bowel.
2. the sphincter ani proper, sphincter externus, or external sphincter is a thin, flat plane of voluntary muscular fibers supplied by hemorrhoidal branches of nerves from the sacral plexus, surrounding the anus, subcutaneous and intimately adherent to the integument, of elliptical form 3 or 4 inches in long diameter, and an inch wide across. it arises from the tip of the coccyx, and is inserted into the tendinous raphe of the perineum. like most sphincters. it consists of symmetrical lateral halves united by a raphe in front of and behind the opening it incloses.
3. the sphincter recti, sphincter internus, or internal sphincter surrounds the lower end of the rectum, forming a muscular ring about an inch in extent and a quarter of an inch thick, and consists of an aggregation and thickening of the circular fibers of the gut. this sphincter is involuntary, and in health maintains its tonic contractility, which yields by reflex action to the pressure of the contents of the bowel.
from The Century Dictionary and Cyclopedia