Difference between revisions of "Ileum - Anatomy & Physiology"

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<big><center>[[Alimentary - Anatomy & Physiology|'''BACK TO ALIMENTARY - ANATOMY & PHYSIOLOGY''']]</center></big><big><center>
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[[Small Intestine - Anatomy & Physiology|'''BACK TO SMALL INTESTINE - ANATOMY AND PHYSIOLOGY]]</center></big>
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==Introduction==
 
==Introduction==
  
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The ileum is the terminal portion of the [[Small Intestine Overview - Anatomy & Physiology|small intestine]] and continues from the [[Jejunum - Anatomy & Physiology|jejunum]]. It opens into the [[Caecum - Anatomy & Physiology|caecum]] at the '''ileocaecal orifice'''. The intestinal epithelium is mainly absorptive, with much less digestion occurring compared to the [[Duodenum - Anatomy & Physiology|duodenum]] and the [[Jejunum - Anatomy & Physiology|jejunum]].
 
  
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==Structure==  
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==Structure==
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*The ileum is the terminal portion of the small intestine.
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*The boundary between the ileum and jejunum is arbitrarily distinguished by the position of the ileocaecal fold.
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*It is more muscular and firmer than the jejunum.
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*It terminates at the ileocaecocolic junction.
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==Function==
  
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The boundary between the ileum and jejunum is arbitrarily distinguished by the position of the ileocaecal fold. It is more muscular and firmer than the jejunum and it terminates at the '''ileocaecocolic junction'''.
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*Mainly absorptive
  
 
==Vasculature==
 
==Vasculature==
  
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The cranial mesenteric artery supplies blood to the ileum.
 
  
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==Histology==
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==Innervation==
  
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'''[[Peyer's Patches - Anatomy & Physiology|Peyer's Patches]]''', part of the [[:Category:Mucosal Associated Lymphoid Tissue|mucosal associated lymphoid tissue (MALT)]], are present throughout the ileum and ileocaecal junction. They exist within the lamina propria and contain B and T [[:Category:Lymphocytes|lymphocytes]]. B lymphocytes exist in follicles.
 
  
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==Links==
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==Lymphatics==
  
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'''Click here for information on [[Intestines, Small and Large - Pathology|pathology of the Small and Large Intestines]].'''
 
  
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'''Click here for information on [[Peyer's Patches - Anatomy & Physiology|Peyer's Patches]].'''
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==Histology==
  
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{{Template:Learning
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*'''[[Ileal Peyer's Patch - Anatomy & Physiology|Peyer's Patches]]''', part of the mucosal associated lymphoid tissue (MALT), are present throughout the ileum and ileocaecal junction.
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|flashcards = [[Ileum - Anatomy & Physiology - Flashcards|Ileum anatomy]]
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**They contain B and T lymphocytes.
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|videos = [[Video: Ruminant small and large intestine potcast|Ruminant small and large intestine potcast]]<br>[[Video: Ruminant abdomen potcast|Ruminant abdomen potcast]]<br>[[Video: Foal gastrointestinal tract potcast|Foal gastrointestinal tract potcast]]<br>[[Video: Lateral view of the feline thorax and abdomen potcast|Lateral view of the feline thorax and abdomen potcast]]<br>[[Video: Female dog abdomen dissection|Female dog abdomen dissection]]<br>[[Video: Abdominal viscera of the horse dissection|Abdominal viscera of the horse dissection]]<br>[[Video: Equine left-sided abdominal and thoracic topography dissection|Equine left-sided abdominal and thoracic topography dissection]]<br>[[Video: Equine left-sided abdominal and thoracic topography dissection 2|Equine left-sided abdominal and thoracic topography dissection 2]]<br>[[Video: Ovine large and small intestine dissection|Ovine large and small intestine dissection]]<br>[[Video: Porcine abdomen dissection|Porcine abdomen dissection]]
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**B lymphocytes exist in follicles.
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|Vetstream = [https://www.vetstream.com/canis/Content/Disease/dis02601.asp Ileus]
 
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}}
 
  
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==Species Differences==
  
  
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{{OpenPages}}
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==Links==
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[[Category:Small Intestine - Anatomy & Physiology]]
 
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[[Category:A&P Done]]
 

Revision as of 16:39, 9 July 2008

BACK TO ALIMENTARY - ANATOMY & PHYSIOLOGY
BACK TO SMALL INTESTINE - ANATOMY AND PHYSIOLOGY


Introduction

Structure

  • The ileum is the terminal portion of the small intestine.
  • The boundary between the ileum and jejunum is arbitrarily distinguished by the position of the ileocaecal fold.
  • It is more muscular and firmer than the jejunum.
  • It terminates at the ileocaecocolic junction.

Function

  • Mainly absorptive

Vasculature

Innervation

Lymphatics

Histology

  • Peyer's Patches, part of the mucosal associated lymphoid tissue (MALT), are present throughout the ileum and ileocaecal junction.
    • They contain B and T lymphocytes.
    • B lymphocytes exist in follicles.

Species Differences

Links

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