Chapter 35.1, Problem 5MI

Summary Introduction

To determine:

The digestion process taking place in different organs of the digestive system.

Introduction:

Digestive system is an organ system which is involved in the mechanical and chemical breakdown of the nutrients present in food and absorption of the nutrients.

Explanation of Solution

Given below is the mechanical and chemical digestion that takes place in different organs:

Organ	Mechanical digestion	Chemical digestion
Mouth	Grinding of food into smaller pieces by teeth.	Digestion of starch by salivary amylase.
Stomach	Churning of smooth muscles that breaks food in small pieces.	Digestion of protein by action of pepsin. Gastric lipase breaks down triglyceride.
Small intestine	Emulsification of bile causes breakdown of fat into small particles.	With help of bile, trypsin, and amylase, the digestion of fats protein and carbohydrates takes place in small intestine.
Pancreas	Does not apply	Produces enzymes that digest carbohydrates. Proteins and fats secrete alkaline fluid that aids the action of enzyme.
Liver	Does not apply	Bile produced by liver result in digestion of bile.