Chapter 54, Problem 1PL

Which of the following digestive organs possesses villi?
a. esophagus
b. stomach
c. small intestine
d. large intestine

Summary Introduction

Introduction:

The digestive system consists of digestive parts that are involved in utilizing nutrients from complex food substances. The digestive system helps in digestion and absorption of food. The digestive system consists of mouth, esophagus, stomach, small intestine, and large intestine.

Answer to Problem 1PL

Correct answer:

The correct answer is option (c) small intestine.

Explanation of Solution

Explanation/justification for the correct answer:

Option (c) small intestine. The complete digestion of food and complete absorption of nutrients occurs in the small intestine through its wall. The small intestine possesses villi that are finger-like projections works to provide surface area and absorbs the digested food. So, the correct answer is an option (a).

Explanation for incorrect answer:

Option (a) esophagus. The 25cm long tube that connects the mouth and the stomach is the esophagus. The walls of this tube squeeze to allow swallowing of food and do not consist of villi. So, this is an incorrect option.

Option (b) stomach. The pear-shaped internal organ that allows most of the digestion of food inthe stomach. The wall of the muscular organ, stomach consists of gastric glands that secrete substances for food digestion. So, this is an incorrect answer.

Option (d) large intestine. The large intestine is the last part of the digestive tract and allows maximum absorption of water. The large intestine consistsof goblet cells but no villi. The goblet cells secrete mucin that forms mucus in water. So, this is an incorrect answer.