The small intestine is specialized for absorption. The absorptive effectiveness is enhanced by increasing the surface area of the intestinal wall. Which of the following accomplish this task?

Question

Quizplus · Accepted Answer

Plicae circularis are circular folds of the intestinal mucosa that increase the surface area for absorption. Intestinal villi are finger-like projections that further increase the surface area available for absorption. The rugae are folds in the stomach lining that allow for expansion. Intestinal glands secrete hormones, mucus, and digestive enzymes, but do not increase surface area for absorption. Digestive enzymes play a role in chemical digestion, but do not increase surface area for absorption.

The Small Intestine Is Specialized for Absorption