Figure 24-2 The Wall of the Small Intestine

Use Figure 24-2 to answer the following questions:
-What is the name of the structure labeled "6"?
A) circular folds
B) villi
C) microvilli
D) lacteal
E) rugae

Question

Figure 24-2 The Wall of the Small Intestine
 
Use Figure 24-2 to answer the following questions:
-What is the name of the structure labeled "6"?
A) circular folds 
B) villi 
C) microvilli 
D) lacteal 
E) rugae

Quizplus · Accepted Answer

The structure labeled "6" in Figure 24-2 is the villi, which are finger-like projections that increase the surface area of the small intestine for absorption of nutrients. Choice A (circular folds) is incorrect because those are the folds in the intestinal lining that help mix and move food along the tract. Choice C (microvilli) are tiny hair-like projections on the surface of intestinal cells that further increase surface area for absorption. Choice D (lacteal) is a lymphatic vessel within a villus that helps absorb fats. Choice E (rugae) are folds in the stomach lining that help with stretching the stomach for digestion.

Figure 24-2 the Wall of the Small Intestine