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===To mix content and transport chyme===
 
===To mix content and transport chyme===
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[[Image:tunica muscularis.jpg|thumb|right|150px|Orientation of muscle in the tunica muscularis- © RVC 2008]]
 
*Contraction of the two muscle layers facilitates mixing and transportation.
 
*Contraction of the two muscle layers facilitates mixing and transportation.
 
*There are two types of muscle contraction:
 
*There are two types of muscle contraction:
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