Food In The Human Body

2.1 Human body

Food, water and oxygen are life-sustaining substance essential to human life. Food provides both energy and the material needed for body cells. Nutrients are nourishing substances in food. These are needed for growth and development from childhood to entire life cycle for maintenance of body functions (Aguilera and Stanley, 1999). Food, water and oxygen are life-sustaining substance essential to human life. Nutrients are nourishing substances in food. These are needed for growth and development from childhood to entire life cycle for maintenance of body functions (Krishnaswamy and Sesikeran, 2010, p 1f).

2.1.1 Chemical composition of human body

The chemical composition of human body is exactly the ads that human eats every day,

It is a source of nutrient and provides the energy required for all activities of human body, as growth, repair of the damaged tissues, reproduction and sustenance (John and Jenifer, 2008). Food is consumed to satisfy primarily hunger, which is an unpleasant sanitation, hunger is a physiological condition associated with the contraction of the stomach and leads to other sensations such as weakness, irritability and even nausea (Burchi, et al., 2011). Food is also sought to satisfy the appetite, a pleasant sensation causing a person to satisfy the craving of the body or food. It is more of a psychological state usually felt in the mouth depending on odour and floor as well as the memory of a pleasant food (Shivasankar, 2009) Apart from being a source of nutrients and energy, food also gives a sense of security in the sense those individuals, communities and nations feet secure when enough food is stored to meet the requirement design scarcity periods (FAO,

This curiosity led to the development of the science of nutrition. It is a scientific study of food and its relation to health. It can also be defined as the science, which deals with those processes by which body utilities food for energy, growth and maintains of health. Food of proper nutritional value, Hygienic in quality and appropriate in quantity is essential for good health and active life. Optimum health, belong to the broad groups of carbohydrates, proteins, fats, vitamins and minerals. In order to supply our daily food requirements, we must have a suitable intake of these nutrients and hence body will get a balances died. This contains various groups of food stuffs such as energy yielding food (carbohydrates and fat sources) body building foods (protein source) and protective foods (minerals and vitamin sources) in correct proportion so that an individual is assured of obtaining the minimum requirements of all the nutrients (Wodon,