How is the small intestine designed to absorb digested food?

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Lined by epithelium, which is specialized to absorb.

Villi possesses blood capillaries and lacteal (lymph vessels) for quick transport of absorbed food.

Villi are transverse folds of the intestinal wall that increase surface area of absorption.

All of the above.

answer is D.

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Detailed Solution

Correct option: All of the above

For absorption of digested food, small intestine is the most important part of the alimentary canal. This is because of the following reasons:
- The mucosa of the small intestine is lined with a simple columnar epithelium in which absorbent cells are embedded that help absorb nutrients from food in the small intestine.
- The small intestine's villi are small, finger-like protrusions that generally extend into the lumen of the small intestine. The size of each villus is about 0.5-1.6 mm in length. These finger-like protrusions help increase the surface area for absorption.
- Villi are composed of a network of capillaries to absorb digested simpler food molecules and lymph vessels specifically to help in absorption of fatty acids.

Hence the correct answer is option D.

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