body systems

... Unit 10:- Human Physiology for Health and Social Care P3+p4 For the human to survive and function properly, we need energy to let the cells repair themselves. To get this energy, we need to consume three main substances; * Carbohydrates (one of the three main classes of food and a source of energy. Carbohydrates are the sugars and starches found in breads, cereals, fruits, and vegetables, which, during digestion, are changed into a simple sugar called glucose. Glucose is stored in the liver until cells need it for energy.) * Protein (A naturally occurring combination of amino acids. Protein is one of the essential components of all living things and the diet of animal organisms.) and, * Lipids (Another term for fats that can be broken down into fatty acids.) It is important to eat a healthy amount of the substances found above because food provides energy that the cells need to develop, change, and

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