lesson 5 what are nutrients?. you must eat to stay alive. food supplies certain important chemicals...
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Lesson 5
What are nutrients?
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You must eat to stay alive. Food supplies certain important chemicals called nutrients.
Your body needs nutrients for growth and energy.
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Most foods supply several nutrients. Most foods, however, are very rich in one or two nutrients.
There are 5 groups of nutrients.
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Carbohydrates:
Supply energy, turn into glucose during digestion.
Two kinds: sugars and starches.
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Fats:
Supply energy, but is usually stored energy.
Keep the body warm.
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Proteins:
Are needed to build and repair cells and tissues.
Also an important part of protoplasm, the living material in cells.
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Vitamins:
Help control chemical reactions in the body. For example, they control the amount of energy that cells give off. They also are needed for proper growth.
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Minerals:
Are important for healthy tissue. For example, minerals build strong bones and teeth.Muscles, nerves and blood also need minerals.
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