Digestive System
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Digestive System
Why Is Digestion of Food Necessary?
Digestive System
The food we eat, for example, rice, bread, vegetables and fruits, cannot be directly used by our body to get energy.
Why Is Digestion of Food Necessary?
Digestive System
The pieces of food are too big to enter the tiny cells of our body. The food must therefore be broken down into small, simple pieces.
DigestionDigestive System
The breaking down of food inside our body is called digestion. The blood takes the broken down food to all cells of our body.
Digestive SystemDigestive System
Digestion takes place in a number of steps. There are several organs in the body that help digestion. Together, they make up our digestive system.
MouthDigestive System
Digestion starts in the mouth. The food must be first broken down into smaller pieces by our teeth when we chew it.
ChewingDigestive System
The sharp teeth in front, bite and cut the food into smaller pieces. The back teeth are flat and help to grind the food into a paste.
SalivaDigestive System
The saliva, a digestive juice made by the salivary glands, mixes well with the food while chewing. This softens the food, so that it can be swallowed easily. Saliva also
starts breaking down starches into simpler soluble substances.
TongueDigestive System
Our tongue helps mix the food with the saliva, and to push the food into the food pipe.
Food PipeDigestive System
The food goes to the stomach through the food pipe. The stomach muscles churn the food with more digestive juices.
StomachDigestive System
These juices break down proteins and other substances into simple soluble substances. The food remains in the stomach for upto three hours.
Small IntestineDigestive System
From the stomach, the food goes into a pipe called the small intestine. Here the food is mixed with more digestive juices and is broken down further. Some of
these juices are produced in the small intestine.
Liver & PancreasDigestive System
Others are produced in other organs such as the liver and pancreas. These juices complete the digestion of the food.
Small IntestineDigestive System
The food is now in a simple soluble form. It is absorbed into the blood through the walls of the small intestine. The blood takes it to all the cells in the body.
Large IntestineDigestive System
Some parts of the food cannot be digested by our body. They pass into the pipe called the large intestine. Here, water is absorbed from the undigested food. The solid left
behind is thrown out of the body as waste through the opening called anus.
Digestive SystemDigestive System
Good Eating Habits
Digestive System
Never be in a hurry to finish your food. Chew your food properly before swallowing it. This makes the digestion of food much easier.
Good Eating Habits
Digestive System
Rest a while after eating. Your stomach needs oxygen to digest food. If you start playing, the other organs take away the oxygen and you may get stomach ache.
Good Eating Habits
Digestive System
Eat lots of vegetables and fruits. Besides nutrients, they also have fibre. Your body cannot digest fibre but it is useful to remove wastes from your body.
Good Eating Habits
Digestive System
Rinse your mouth thoroughly after eating.
Good Eating Habits
Digestive System
You should eat a balanced diet and drink plenty of water.
Good Eating Habits
Digestive System
You must wash your hands well with soap and water before and after you eat your food.
This presentation is a result of my experiences while I was helping out my son with his school assignments and project work. I am happy to share this with other students and their parents. Hope you find this informative and useful. Thank you.
- Prashant Mahajan -
All pictures belong to their original authors, photographers.
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