All three structures/cell modifications mentioned - Microvilli, Villi, and Plica circularis - increase the surface area of absorption in the small intestine.

1. Microvilli: These are tiny hair-like structures present on the surface of the epithelial cells lining the small intestine. They increase the surface area for absorption significantly.

2. Villi: These are small, finger-like projections that protrude from the epithelial lining of the small intestine. Each villus is covered with epithelial cells that have microvilli, further increasing the surface area for absorption.

3. Plica circularis: These are large, circular folds in the lining of the small intestine. They slow down the passage of food, allowing more time for nutrients to be absorbed. They also increase the surface area for absorption.

So, all three structures/cell modifications - Microvilli, Villi, and Plica circularis - play a crucial role in increasing the surface area for absorption in the small intestine.

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All three structures/cell modifications mentioned - Microvilli, Villi, and Plica circularis - increase the surface area of absorption in the small intestine.

1. Microvilli: These are tiny hair-like structures present on the surface of the epithelial cells lining the small intestine. They increase the surface area for absorption significantly.

2. Villi: These are small, finger-like projections that protrude from the epithelial lining of the small intestine. Each villus is covered with epithelial cells that have microvilli, further increasing the surface area for absorption.

3. Plica circularis: These are large, circular folds in the lining of the small intestine. They slow down the passage of food, allowing more time for nutrients to be absorbed. They also increase the surface area for absorption.

So, all three structures/cell modifications - Microvilli, Villi, and Plica circularis - play a crucial role in increasing the surface area for absorption in the small intestine.

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All three structures/cell modifications mentioned - Microvilli, Villi, and Plica circularis - increase the surface area of absorption in the small intestine.

1. Microvilli: These are tiny hair-like structures present on the surface of the epithelial cells lining the small intestine. They increase the surface area for absorption significantly.

2. Villi: These are small, finger-like projections that protrude from the epithelial lining of the small intestine. Each villus is covered with epithelial cells that have microvilli, further increasing the surface area for absorption.

3. Plica circularis: These are large, circular folds in the lining of the small intestine. They slow down the passage of food, allowing more time for nutrients to be absorbed. They also increase the surface area for absorption.

So, all three structures/cell modifications - Microvilli, Villi, and Plica circularis - play a crucial role in increasing the surface area for absorption in the small intestine.

Which of the following structures/cell modifications increase surface area of absorption at the small intestine? (more than one answer might be possible)Group of answer choicesMicrovilliVilliPlica circularis

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