The digestive process is important in maintaining the lives of living organisms and in providing them with needed energy. Groups of organs, such as the mouth, esophagus, stomach, and intestines, work together to perform this complex task. Digestion is theprocess of breaking down food from large molecules into small ones to makeit easier for absorption. The three major steps involved in the digestive process are ingestion, digestion, and absorption.
Ingestion, which occurs in the mouth, is the first step of the digestive process. After food enters the mouth, the teeth chew it. Saliva, which is produced by the salivary glands, plays a major role in breaking down the food into smaller pieces. These small pieces travel to the stomach through the esophagus.
INTRODUCTION
1. State what the process is and why it is important.
The digestive process is important in maintaining the lives of living organisms and in providing them with needed energy.
2. Give background information, and define the process.
Groups of organs, such as the mouth, esophagus, stomach, and intestines, work together to perform this complex task. Digestion is the process of breaking down food from large molecules into small ones to make it easier for absorption.
3. State the thesis sentence to include the purpose and the main idea of the essay.
The three major steps involved in the digestive process are ingestion, digestion, and absorption.