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sphincters and are
They are also in the smooth muscles of the gastrointestinal tract ( GIT ), which help in increasing intestinal motility and dilating sphincters.
Sphincters are found in many animals ; there are over 50 types in the human body, some microscopically small, in particular the millions of precapillary sphincters.
Many sphincters are used every day in the normal course of digestion and vision.
* Voluntary sphincters are supplied by somatic nerves.
* Involuntary sphincters are stimulated by autonomic nerves.
* At the anus, there are two sphincters which control the exit of feces from the body ( see internal anal sphincter and external anal sphincter ).
* Congressman Steve LaTourette ( R-OH 14 ) invoked the catchphrase while criticizing the American Recovery and Reinvestment Act of 2009: " Well, today there's another sucking sound going on in Washington, D. C. And that's the tightening of sphincters on both ends of Pennsylvania Avenue as people are having to explain who put into the stimulus bill this provision of law.

sphincters and smooth
As anaerobic metabolism continues, increasing the body's metabolic acidosis, the arteriolar smooth muscle and precapillary sphincters relax such that blood remains in the capillaries.

sphincters and muscles
Fecal incontinence can be caused by injury to one or both of the ring-like muscles at the end of the rectum called the internal and external anal sphincters.
The damage of nerves to the esophagus and to the stomach valve muscles ( sphincters ) can cause stomach reflux.

sphincters and blood
* The microscopic precapillary sphincters function to control the blood flow into each capillary in response to local metabolic activity.
Smooth muscle forms precapillary sphincters in blood vessels in metarterioles which regulates the blood flow in capillary beds of various organs and tissues.
Smooth muscle contracts slowly and may maintain the contraction ( tonically ) for prolonged periods in blood vessels, bronchioles, and some sphincters.
However, some species of Crocodilians have regulatory sphincters that prevent unwanted flow of blood through the foramen of panizza during non-diving.

sphincters and into
Sphincters can be further classified into functional and anatomical sphincters:

sphincters and through
* Functional sphincters do not have this localised muscle thickening and achieve their sphincteric action indirectly through muscle contraction around ( extrinsic ) or within ( intrinsic ) the structure.

sphincters and .
Two sphincters keep the contents of the stomach contained.
The internal and external anal sphincters along with the puborectalis muscle allow the feces to be passed by pulling the anus up over the exiting feces in shortening and contracting actions.
The pudendal nerve is a sensory and somatic nerve in the pelvic region that innervates the external genitalia of both sexes, as well as sphincters for the bladder and the rectum.
* Constricts all the intestinal sphincters and the urinary sphincter.
A-puborectalis, B-rectum, C-level of anorectal ring and anorectal angle, D-anal canal, E-anal verge, F-representation of internal and external anal sphincters, G-coccyx & sacrum, H-pubic symphysis, I-Ischium, J-pubic bone.
During normal function, these sphincters help retain stool.
Hemorrhoid surgery can damage the sphincters as well.
* Anatomical sphincters have a localised and often circular muscle thickening to facilitate their action as a sphincter.
It involves closure of bladder neck, followed by the rhythmic contractions of the urethra by pelvic-perineal and bulbospongiosus muscle, and intermittent relaxation of external urethral sphincters.
Outlet obstruction is a sub-type of large bowel obstruction and refers to conditions affecting the anorectal region that obstruct defecation, specifically conditions of the pelvic floor and anal sphincters.
This latter hypothesis is posited due to the presence of precapillary sphincters in capillary beds.
It is important in providing support for pelvic viscera ( organs ), e. g. the bladder, intestines, the uterus ( in females ), and in maintenance of continence as part of the urinary and anal sphincters.

are and rings
Another set of methods is the aromatization of cyclohexanes and other aliphatic rings: reagents are catalysts used in hydrogenation such as platinum, palladium and nickel ( reverse hydrogenation ), quinones and the elements sulfur and selenium.
Therefore rings and Z-algebras are equivalent concepts, in the same way that abelian groups and Z-modules are equivalent.
In organic chemistry, compounds composed of carbon and hydrogen are divided into two classes: aromatic compounds, which contain benzene or similar rings of atoms, and aliphatic compounds (; G. aleiphar, fat, oil ), which do not contain those rings.
In aliphatic compounds, carbon atoms can be joined together in straight chains, branched chains, or non-aromatic rings ( in which case they are called alicyclic ).
Four rings of gold are to be attached to its four feet — two on each side — and through these rings staves of shittim-wood overlaid with gold for carrying the Ark are to be inserted ; and these are not to be removed.
For bridged alkenes, the Bredt's rule states that a double bond cannot be placed at the bridgehead of a bridged ring system, unless the rings are large enough.
His plot thoroughly unraveled, Pseudolus appears to be in deep trouble — but Erronius, completing his third circuit of the Roman hills, shows up fortuitously to discover that Miles Gloriosus and Philia are wearing matching rings which mark them as his long-lost children.
The ascending chain condition ( ACC ) and descending chain condition ( DCC ) are finiteness properties satisfied by some algebraic structures, most importantly, ideals in certain commutative rings.
Minsk has a digital metropolitan network ; waiting lists for telephones are long ; fixed line penetration is improving although rural areas continue to be undeserved ; intercity-Belarus has developed fibre-optic backbone system presently serving at least 13 major cities ( 1998 ); Belarus's fibre optics form synchronous digital hierarchy rings through other countries ' systems ; an inadequate analogue system remains operational.
Binary operations are the keystone of algebraic structures studied in abstract algebra: they form part of groups, monoids, semigroups, rings, and more.
This ring has the property that a · a = a for all a in A ; rings with this property are called Boolean rings.
The categories of Boolean rings and Boolean algebras are equivalent.
There are four gearing options: two-speed hub gear integrated with chain ring, up to 3 chain rings, up to 11 sprockets, hub gear built in to rear wheel ( 3-speed to 14-speed ).
The most common options are either a rear hub or multiple chain rings combined with multiple sprockets ( other combinations of options are possible but less common ).
** β-Lactams containing thiazolidine rings are named penams.
** β-Lactams containing pyrrolidine rings are named carbapenams.

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