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Digestive System for Kids

Last updated date: 05th Mar 2024
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Introduction to Digestive System

When you're feeling hungry and your tummy is rumbling. What do you do? Well, if you're anything like most people, you head straight for the refrigerator. But what's inside that fridge? A whole lot of food! Food that your body needs to tell you what to do! The digestive system breaks down food into nutrients such as carbohydrates, fats and proteins. If you're looking for a fun and interesting way to teach your kids about the human digestive system, then this is the perfect article for you! Break down the digestive system process and show them an easy-to-understand diagram of the digestive system.

What is the Digestive System?

The system present in the body and consists of the gastrointestinal tract and accessory organs of digestion is known as the digestive system. The digestive system breaks down the food we eat into nutrients, vitamins, and minerals. It takes complex substances such as carbohydrates, proteins, etc in our food into simpler substances like sugar and amino acids that the body can easily absorb. They can then be absorbed into the bloodstream so the body can use them for energy, growth and repair. The process of biochemical and mechanical breakdown of food into simpler components for easier absorption performed by the digestive system is known as digestion.

Our body needs energy to perform day-to-day activities. We all eat food throughout the day. Food is the most important fuel to run our body. We get energy from the food, So that is why our parents and near n dear ones always suggest we eat well so as to stay healthy.

Fruits and Vegetables

Fruits and Vegetables

But what happens to food after we swallow it? Have you ever thought about how food is converted into energy? How do we get the required nutrients from food? And how does this whole process take place? To understand this we need to study the digestive system of our body. As the digestive system helps to digest the food we eat. 



What is a Digestive System?

The digestive system consists of a group of organs that break down the food in order to absorb the nutrients from it. These nutrients in food are used by our body as fuel for keeping all our body systems working. 

The digestive system consists of the following parts:

  1. Mouth

  2. Oesophagus

  3. Stomach

  4. Small intestine

  5. Large intestine

  6. Anus

Digestive System Diagram for Kids

Human Digestive System

Human Digestive System

Parts of the Digestive System

1. Mouth: The digestion process starts at the beginning when food is chewed by the mouth.



2. Oesophagus: It is a tube behind the windpipe which is inside the throat. After food is chewed it goes to the oesophagus.



3. Stomach: The stomach is the place where the food gets mixed with various enzymes and acids that are secreted by the stomach.The Hydrochloric acid that helps in activation of enzymes which are helpful in digestion.



4. Small Intestine: It is a long tube where most of the minerals and vitamins are absorbed from the digested food into the blood.

Small Intestine


Small Intestine

5. Large Intestine: It is the place where the water from the waste material is absorbed. The various sections of the large intestine are: the cecum, ascending colon, transverse colon, descending colon, and sigmoid colon.

Large Intestine

Large Intestine

6. Rectum: It is a reservoir that holds stool or faecal matter till the time it is passed out from the body.




How does the Digestive System Work?

In Digestion, the food moves through the Gastrointestinal Tract. The process of digestion begins in the mouth with the chewing of food and ends in the small intestine. 

As the food passes from the GI tract it gets mixed with the various digestive enzymes and juices in the stomach which helps in breaking the larger molecules of food into smaller molecules. 

The body then absorbs the smaller molecules of food with the help of the walls of the small intestine which in turn delivers it to the rest of the body parts. 

Then the remaining waste products of the process of digestion pass to the large intestine and then out of the body in the form of solid matter called stool/ faecal matter.

Functions of Digestive System 

The functions of the digestive system are discussed below:

  1. Ingestion of food: It is a process in which food enters through the mouth into the alimentary canal.

  2. Secretion: In this, there is the release of various enzymes, acids, hormones, and other substances which help the body in digesting the food which we eat.

  3. Digestion: The nutrients and minerals which are not digested from the food are broken down by the digestive system into smaller molecules so that energy is produced.

  4. Absorption: The lymph system then absorbs the various vitamins and fatty acids for use by the small intestine.


The digestive system is responsible for breaking down food and absorbing nutrients from the stomach and small intestine. It also helps to keep toxins out of the body and excretes waste products through the rectum and anus.  In this article, we covered the digestive system diagram for kids and how it works. We have also discussed what is the digestive system and its functions. The food we eat gets digested in our stomach now we are familiar with how it does. The enzymes and juices soften the food and then it acts as fuel to our body. Complex substances like carbohydrates, proteins, etc present in our food are converted into simpler substances like sugar and amino acids so that the body can easily absorb and digest them. In case of any other doubts feel free to contact us in the comments.

FAQs on Digestive System for Kids

1. What is the size of your empty stomach and how long does it take for your digestive system to complete the whole process?

The size of our stomach is nearly about the size of a fist when it is empty.

The length of the process for the digestion of food varies from one person to another. On average, the food may take as less as two hours to get digested or it can even take as long as many days to get digested. The whole process starts when the food is chewed in the mouth then it gets mixed with our saliva and travels to the stomach through the oesophagus. In the stomach, it gets mixed with various juices and enzymes and then further travels to the intestines.

2. Define the digestive system?

The digestive system consists of a group of organs that break down the food in order to absorb the nutrients from it. Moreover, these nutrients in food are used by our body as fuel for keeping all our body systems working. The digestive system consists of the following parts: Mouth, Oesophagus, Stomach, Small intestine, Large intestine, and Anus. The digestive system plays a very important role in the human body. Thus we can conclude that a digestive system is a group of organs with help of which food gets digested into smaller particles from complexes which further give important nutrients.

3. Write some interesting facts about the digestive system for kids.

Some interesting facts are following:

  1. The muscles in our oesophagus act like a giant wave. This is how food moves down our stomachs.

  2. Our small intestine is around 22-23 feet long whereas our large intestine is only 5 feet long.

  3. Our stomach has the capacity to hold and stretch food up to 4 pounds at a time.

  4. The amount of saliva that we produce increases when we throw it up. This is done in order to protect our teeth from the acid in the stomach.