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*Continuous [http://en.wikipedia.org/wiki/Peristalsis| peristalsis] discourages persistence of toxins and aids in their elimination from the gut.   
 
*Continuous [http://en.wikipedia.org/wiki/Peristalsis| peristalsis] discourages persistence of toxins and aids in their elimination from the gut.   
 
''Cell-mediated and humoural defences''
 
''Cell-mediated and humoural defences''
*The lamina propria contains macrophages, B and T lymphocytes, plasma cells, and [[Mast cells - Anatomy & Physiology|mast cells]].
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*The lamina propria contains macrophages, B and T lymphocytes, plasma cells, and [[Mast Cells - WikiBlood|mast cells]].
 
*Lymphoid aggregates known as [[Peyer's Patches - Anatomy & Physiology|Peyer's patches]] within the [[Small Intestine - Anatomy & Physiology|small intestine]] aid in immunity.
 
*Lymphoid aggregates known as [[Peyer's Patches - Anatomy & Physiology|Peyer's patches]] within the [[Small Intestine - Anatomy & Physiology|small intestine]] aid in immunity.
 
*Secretory IgA and IgM provide humoural immunity and help prevent attachment of pathogens to the intestinal epithelium.
 
*Secretory IgA and IgM provide humoural immunity and help prevent attachment of pathogens to the intestinal epithelium.