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==Introduction==
==Introduction==
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]].
==Structure==
==Structure==
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'''.
==Vasculature==
==Vasculature==
The cranial mesenteric artery supplies blood to the ileum.
==Innervation==
==Histology==
'''[[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.
==Lymphatics==
==Links==
'''Click here for information on [[Intestines, Small and Large - Pathology|pathology of the Small and Large Intestines]].'''
'''Click here for information on [[Peyer's Patches - Anatomy & Physiology|Peyer's Patches]].'''
{{Template:Learning
|flashcards = [[Ileum - Anatomy & Physiology - Flashcards|Ileum anatomy]]
|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]]
|Vetstream = [https://www.vetstream.com/canis/Content/Disease/dis02601.asp Ileus]
}}
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[[Category:Small Intestine - Anatomy & Physiology]]
[[Category:A&P Done]]