Why is small intestine so long
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Despite its small diameter, the small intestine actually has a very high surface area. That's because its walls are actually covered in folds and hair-like projections. This increased surface area allows for more absorption of nutrients and water.
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Answer:
Despite its small diameter, the small intestine actually has a very high surface area. That's because its walls are actually covered in folds and hair-like projections. This increased surface area allows for more absorption of nutrients and water.
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