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