Page 39 - Science class 4

Unit-III : Human Body

5 Food and Digestion

l Food
l Nutrients, Carbohydrates, Fats, Proteins, Vitamins,
Inside
Inside
the Minerals, Water, Roughage
the
Chapter l Balanced Diet l Digestion
Chapter
l Process of Digestion l Healthy Eating Habits
l Cooking Food l Food Preservation

FOOD

All living beings need food to stay alive. Food gives us
energy and helps us to grow. Food also repairs the worn

out tissues of our body.
We eat various kinds of food that give all essential nutrients

to the body to work, play and fight against diseases. This is
because our body needs different substances for

doing different things. These nutrients provide energy. Some nutrients help to

grow and others help to fight diseases.
Our body works nonstop, when we run, walk or talk. Some parts of our body

keep working even when we are asleep. For example - our lungs and heart. Our

body requires energy to do all this work.

Nutrientsutrientsutrients
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Food is made up of useful
Lack of iron in the blood causes substances called nutrients . These
anaemia.
nutrients are present in different
food items in different quantities.

It is, therefore, important for us to eat various food items. The five nutrients

present in our food are carbohydrates, fats, proteins, vitamins and minerals.

Carbohydrates
They provide us energy for doing work.

Sugar and starch are carbohydrates.
Potato Bread Rice

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