Healthy Eating

All life processes in the body are in a great matter of what constitutes his food since the first days of life, as well as diet. Every living organism in the process of life continuously spends its constituent substances. Much of these substances "burned" (oxidized) in the body, resulting in energy is released. This energy the body uses to maintain a constant body temperature, to ensure the normal functioning of the internal organs (heart, respiratory system, circulatory system, nervous system, etc.) and in particular to perform physical work.  Nutrition is necessary and the first condition of life. Not surprisingly, all the universal natural science concepts included as an important and necessary part of the theory of supply. History of science are two theories of supply. The first occurred in ancient times, the second - the classical theory of a balanced diet - finally formed at the end of XIX - the first half of XX century. ancient theory of nutrition is associated with the names of Aristotle and Galen, and is part of their representations of the living. According to this theory the power to all structures of the body is due to the blood, which is continuously formed in the digestive system of nutrients as a result of a complex process of unknown nature, in a way similar to the fermentation. The liver cleans the blood, then it is used to supply all organs and tissues. Based on these representations were built numerous therapeutic diets, which were to provide an easier transformation of food into the blood as the best qualities of the latter. From the classical theory of a balanced diet are closely related to common belief about the ideal food and optimal balanced diet. This theory is based on a balanced approach to the assessment and diet, which retains its value and the present time. In its simplest form, this approach is to ensure that the body should do the molecular composition of the substance, which compensates for their expense and losses from the main exchange, work, and for young organisms also increase. Classical theory of a balanced diet based on the following fundamental provisions : 

1.inflow of substances must exactly match their expenses; 

2.influx of nutrients provided by the destruction of structures and absorption of food nutrients - nutrients needed for metabolism and construction of structures of the body; 

3.utilization of food is carried out by the body; 

4.food consists of several components of different physiological significance: food, ballast and toxic substances;

5.metabolism is determined by the level of amino acids, sugars, fatty acids, vitamins and some salts, so we can create a so-called element (monomer) diet.

Nutrients called such chemicals or individual elements, essential to the normal course of its vital processes. The common property of proteins, fats and carbohydrates is their ability to meet energy needs. However, they have relatively high levels of energy released when exposed to the digestive enzymes. food should contain proteins, fats, carbohydrates, vitamins, minerals and water. Need as well, the quantity of food, and in the individual nutrients in children depends primarily on the age and adults - the type of work and living conditions. To better meet this need of the body, it is necessary to know how much energy they consumed per day. Found that the energy produced in the body eventually released as heat.  Under the best nutritional standards understand such rules, which have grown completely cover all the costs of the body, and the children provide, in addition, the needs of growth and development. Proper diet promotes disability rights, and is one of the most important conditions for the normal activity of the gastrointestinal tract.