Page 52 - Science - 5

Proteins are present in almost all food-stuffs but foods like meat, beans, dairy
products, fish, eggs, nuts and pulses are very rich in proteins. Proteins are

called body-building food .

Carbohydrates

Another important nutrient is
carbohydrates. Carbohydrates are
the main source of energy. Sugar

and starch are the simplest form of

carbohydrates. They are the easiest
to digest. Their digestion begins in

our mouth by the action of saliva on
food. So, a large part of our daily

food should contain carbohydrates.
Carbohydrates are present in whole grains, corn, cereals, breads, beans,
grapes, potatoes, peas etc. They are energy-giving food .

Fats
Fats make our food tasty. They provide

us with double the energy than
carbohydrates. Extra fat gets stored in

the body. Excess fat can make a person
over-weight and obese. They are

energy-giving food.
Fats also help to absorb certain

vitamins. They cover the delicate body
parts and protect them from injury.

That is why, fat people are less likely to suffer from broken bones after a fall as
compared to the thin people. Fats keep the body warm. Most oils, butter and

ghee are rich in fats.

Minerals
Plants take minerals from the soil. These

minerals enter our body through the food

we eat. Minerals help the nervous system
to pass messages to different body parts.

They help the muscles to contract.

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