to provide energy - to synthesize protoplasm - maintain health and prevent deficiency
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Carbohydrate
organic compounds made up of the elements made up of the elements carbon, hydrogen and oxygen
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Fats
are organic compounds made up of the elements carbon, hydrogen and oxygen but, unlike carbohydrates, they contain much less oxygen in proportion to hydrogen.
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Proteins
are complex organic substances containing carbon, hydrogen, oxygen and nitrogen
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Vitamins
are group of chemically unrelated organic compounds required in the diet of humans in minute amounts
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Minerals
are inorganic salts which do not provide energy but are indispensable to bodily functions
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Water
is the essential constituent of protoplasm
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Function of Carbohydrates
source of energy helps in forming a supportive structure formation of nucleic acid to produce nectar in some plants
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Function of Proteins
essential for the synthesis of protoplasm for growth and repair of worn out body cells for synthesis of enzymes and hormones for formation of antibodies to combat disease
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Function of Fats
storage form of energy insulating material beneath the skin to prevent heat loss as a solvent for fat soluble vitamins and many other vital substances such as hormones