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Carbohydrates contain the elements carbon, hydrogen & oxygen
Fats contain the elements carbon, hydrogen & oxygen
Proteins contain the elements carbon, hydrogen, oxygen & nitrogen
Carbohydrates Carbohydrates provide us with energy for our normal activities. They consist of long chains of glucose molecules. Glucose
Fats Fats release some energy for our use if required while the rest is stored in adipose tissue beneath the skin. This is used as insulation. Each fat is made up of a glycerol molecule joined to 3 fatty acid molecules. Glycerol Fatty acid Fatty acid Fatty acid
Proteins Our body requires protein to build it up and for repairing damaged tissue. Proteins are built up from long chains of amino acids. There are only about 20 different amino acids.
Some of the food we eat is fresh, e.g. apples and lettuce.
Mostly, however, our food has been processed in some way to make it more attractive, to change its flavour, or to keep it longer.
Processing food often involves adding chemicals called additives.
Vitamins Blood doesn’t clot Green veg. K Reproductive Disorders Wheat germ E Rickets Liver, fish, milk D Scurvy Citrus fruits C (Ascorbic acid) Pellagra Cereal, lean meat B 3 (Niacin) Beri beri Cereal grains B 1 (Thiamine) Night Blindness Milk, fresh veg. A Deficiency Disease Source Vitamin
Minerals Healthy teeth & bones Calcium All cells Sodium Thyroxine Iodine Haemoglobin in Red Blood Cells Iron Required For: Mineral