Which of the following structures increases the total surfac

Which of the following structures increases the total surface area of the small intestine? (CHECK ALL THAT APPLY)

____A. Cilia

____B. Circular folds

____C.microvilli

____D. Villi

Solution

The answer is B. Ciruclar folds and D. Villi.

circular folds - tightly wrinkled into projections those are called circular folds
villi - finger-like projections of mucosal cells known as villi.
Both will increase the surface area.