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Digestion

Digestion

Description:

This lesson will identify the major structures and functions of the digestive system.

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Tutorial

What's Covered

Welcome to this lesson titled digestive system overview. Today you will be taking a look at some of the basic structures and functions associated with the digestive system. Specifically, you will learn about:

  1. Digestive System Overview
  2. Five Main Functions
  3. Digestive System Path

1. Digestive System Overview

The digestive system, if you were to break it down as easily as possible, you could say is like one large tube that has two openings. One where food enters and the other opening is where the waste exits, and in between those openings is where food is digested and nutrients are absorbed.

Term to Know

    • Digestive System
    • A body system involved in digesting and absorbing foods.

2. Five Main Functions

There are actually five main functions of the digestive system.

  • Mechanically Processes Food
  • Digests Food
  • Secretes Enzymes
  • Absorbs Nutrients
  • Eliminates Waste

3. Digestive System Path

The mouth is the site where food enters our body into the digestive system. Within the mouth food is mechanically and chemically broken down; then you will swallow it.

Term to Know

    • Mouth
    • The location where food enters and digestion begins.

Food will then move towards the pharynx, which is also known as your throat, and then from there will move to the esophagus. The esophagus is the tube that connects your mouth and your pharynx to your stomach. Peristalsis are the wavelike motions that will help push food down the esophagus towards your stomach and the rest of your digestive system.

Terms to Know

    • Esophagus
    • A tube that carries food from the pharynx to the stomach.
    • Pharynx
    • Also known as the throat. Food moves from the mouth to the pharynx as a person begins to swallow.
    • Stomach
    • The area where food is stored as well as chemically and mechanically digested before moving into the small intestine.

The stomach is the site where food is mechanically and chemically broken down in. Mechanical and chemical breakdown occurred in the mouth and then will be more extensive in the stomach. There are different enzymes and gastric juices that are chemically digesting food.

From there the food will travel into the small intestine which is the location where most of the nutrients from the food that you eat is absorbed. After the small intestine, food will then move into the large intestine where any remaining nutrients and water are absorbed.

Terms to Know

    • Small Intestine

    • A long tube in which food passes through as nutrients are absorbed.
    • Large Intestine
    • A tube attached to the small intestine where remaining nutrients and water are absorbed before waste is passed.

From there, once nutrients and water and everything that needs to be absorbed have been absorbed, waste will exit out the end of the large intestine (the anus).


Summary

So this lesson has been an overview on the structure and function of the digestive system. Specifically you looked at the five main functions and the path of the digestive system.

Keep up the learning and have a great day!

Source: THIS WORK IS ADAPTED FROM SOPHIA AUTHOR AMANDA SODERLIND

TERMS TO KNOW
  • Digestive System

    A body system involved in digesting and absorbing foods.

  • Mouth

    The location where food enters and digestion begins.

  • Pharynx

    Also known as the throat. Food moves from the mouth to the pharynx as a person begins to swallow.

  • Esophagus

    A tube that carries food from the pharynx to the stomach.

  • Stomach

    The area where food is stored as well as chemically and mechanically digested before moving into the small intestine.

  • Small Intestine


    A long tube in which food passes through as nutrients are absorbed.

  • Large Intestine

    A tube attached to the small intestine where remaining nutrients and water are absorbed before waste is passed.