Multiple choice

With which of the following are villi associated?

  1. Lungs and intestine

  2. Placenta and intestine

  3. Plasma membrane and intestine

  4. Stomach and intestine

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Villi are finger-like projections that increase surface area for absorption. In the small intestine, intestinal villi absorb nutrients from digested food. In the placenta, chorionic villi facilitate exchange of nutrients and wastes between maternal and fetal blood. Villi are not found in lungs (which have alveoli), plasma membrane (a cellular structure), or stomach (which has rugae instead).

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