A sphincter is a ring of muscles that controls the rate of passage of material through an opening or channel in the body. From:Nutritional Biochemistry (Second Edition),1999 Also in subject areas: Immunology and Microbiology Medicine and Dentistry ...
8.You may also stretch your externalsphinctermuscles. 你也有可能会撑大你外括约肌。 「科洞察双语版」评价该例句:好评差评指正 PBS趣味科普 9.It's one of manysphincterson your body. 它是你身体上括约肌之一。 「PBS趣味科普」评价该例句:好评差评指正 ...
5.2.5.2Innervation of iris muscles in elasmobranchs Little is known about the control of elasmobranch iris muscles. As in teleosts, the dilator muscle is parasympathetically controlled by fibres within the 3rd cranial nerve projecting to theCG(Young, 1933a;Kuchnow, 1971), from where (possibly cho...
A sphincter is a circular muscle that normally maintains constriction of a natural body passage or orifice and which relaxes as required by normal physiological functioning. Sphincters are found in many animals. There are over 60 types in the human body,
The upper esophageal sphincter (UES), a conglomeration of skeletal muscles, and the lower esophageal sphincter (LES) constituted by highly specialized smooth muscle (17–20), provide important barrier functions for airway protection and esophageal clearance during swal- lowing and GER events. ...
As no submucosal smooth muscles or elastic fibers were connected to it, the CPM did not accompany a specific elastic structure at the interface between the pharyngeal and esophageal muscles. In fetuses, the medial half of the CPM was inserted into the cricoid while the lateral half continued to...
innervate thesphincter pupillae musclesto produce pupillary constriction. Note that the majority of short ciliary nerves actually innervate theciliary muscleof theciliary body, which assists in theaccommodation reflex, rather than the sphincter pupillae muscles for the pupillary light reflex (Figure ...
Two muscles in the iris determine the size of the pupil. The sphincter pupillae is a band of smooth muscle encircling the pupil margin (SPM inFig. 1C). The SPM is about 0.1–0.17mm thick and 0.7–1mm wide and is located anterior to the pigmented epithelium (PE inFig. 1C). Because...
RegisterLog in Sign up with one click: Facebook Twitter Google Share on Facebook sphincter (redirected fromSphincters) Dictionary Thesaurus Medical sphincter Anatomya ring of muscle surrounding the opening of a hollow organ or body and contracting to close it ...
"contractible animal tissue consisting of bundles of fibers," late 14c., "a muscle of the body," from Latin musculus "a muscle," literally "a little mouse," diminutive of mus "mouse" (see mouse (n.)). So called because the shape and movement of some muscles (notably biceps) were ...