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Patches of lymphoid nodules are present in '''[[Peyer's Patches - Anatomy & Physiology|Peyer's Patches]]'''. They are most abundant in the '''[[Duodenum - Anatomy & Physiology|duodenum]]'''. There are no mesenteric lymph nodes.
Patches of lymphoid nodules are present in '''[[Peyer's Patches - Anatomy & Physiology|Peyer's Patches]]'''. They are most abundant in the '''[[Duodenum - Anatomy & Physiology|duodenum]]'''. There are no mesenteric lymph nodes.
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==Histology==
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*Caeca
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**Serous coat has nerve plexuses
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**Columnar epithelium and goblet cells
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**Smooth muscle in folds at base
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**Caecal sphincter at proximal part containing a lot of lymphoid tissue (caecal tonsil)
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**Middle section has thin walls and appears green
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**The bulbous blind ends have thicker walls
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*See [[Small Intestine - Anatomy & Physiology#Histology|small intestine]]
==Species Differences==
==Species Differences==
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'''Click here for more information on the [[:Category:Large Intestine - Anatomy & Physiology|Large Intestine - Anatomy & Physiology]]'''
'''Click here for more information on the [[:Category:Large Intestine - Anatomy & Physiology|Large Intestine - Anatomy & Physiology]]'''
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'''Click here for [[Avian Intestines - Histology|Avian histology]]'''
[[Category:Small Intestine - Anatomy & Physiology]]
[[Category:Small Intestine - Anatomy & Physiology]]
[[Category:Avian Alimentary System - Anatomy & Physiology]]
[[Category:Avian Alimentary System - Anatomy & Physiology]]
[[Category:To Do - AimeeHicks]][[Category:To Do - AP Review]]
[[Category:To Do - AimeeHicks]][[Category:To Do - AP Review]]