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ninhaxoxo ninhaxoxo
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10 years ago
Explain what anatomical modification in the small intestine greatly improves nutrient absorption.  Name the 3 levels of this anatomical modification.
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10 years ago
The intestine has folds called plicae circulares that increase surface area.  Covering these folds are intestinal villi, which are small finger-like projections that also increase surface area.  Each villus is lined with many microvilli that once again increase surface area. 

Level 1)  plicae circulares
Level 2)  villi
Level 3)  microvilli
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