Difference between revisions of "Large Intestine - Anatomy & Physiology"

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<big><center>[[Alimentary - Anatomy & Physiology|'''BACK TO ALIMENTARY - ANATOMY & PHYSIOLOGY''']]</center></big>
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#REDIRECT[[:Category:Large Intestine - Anatomy & Physiology]]
 
 
==Introduction==
 
 
 
The large intestine extends from the [[Ileum - Anatomy & Physiology|ileum]] of the [[Small Intestine - Anatomy & Physiology|small intestine]] to the anus. It absorbs water from the ingesta and stores faeces prior to defeacation. Every species has a large microbial population living in the large intestine, which is of particular importance to the [[Hindgut Fermenters - Anatomy & Physiology|hindgut fermenters]]. For this reason, hindgut fermenters have a more complex large intestine with highly specialised regions for fermentation.
 
 
 
The large intestine can be divided into:
 
 
 
*[[Caecum - Anatomy & Physiology|Caecum]]
 
*[[Colon - Anatomy & Physiology|Colon]]
 
*[[Rectum - Anatomy & Physiology|Rectum]]
 
 
 
==Structure==
 
 
 
 
 
==Function==
 
 
 
 
 
==Vasculature==
 
 
 
 
 
==Innervation==
 
 
 
*Like the [[Small Intestine - Anatomy & Physiology|small intestine]], the large intestine recieves sympathetic and parasympathetic innervation.
 
*Neurones interact with the myenteric plexus to affect contractility, and with the submucosal plexus to affect secretions.
 
**The '''sympathetic '''have coeliac, cranial mesenteric and caudal mesenteric ganglia.
 
**As the sympathetic fibres leave the ganglia, they surround their respective artery.
 
**'''Parasympathetic''' innervation stimulates peristalsis.
 
 
 
==Lymphatics==
 
 
 
 
 
==Histology==
 
 
 
*The muscosa of the large intestine is smooth; there are '''no villi'''.
 
*There are numerous scattered lymph nodules.
 
*Taenia may be present.
 
 
 
==Species Differences==
 
 
 
===Carnivore===
 
 
 
===Ruminant===
 
 
 
===[[Hind
 
gut Fermenters - Anatomy & Physiology|Horse]]===
 
 
 
===Pig===
 
*Taenia present
 
 
 
==Links==
 
[[The Small and Large Intestines|Pathology of the Small and Large Intestine]]
 

Latest revision as of 14:03, 7 September 2010