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In nature about 135 kinds of water exist. In cells of our organism water is in special form, which we call "structural". Every another fluid, which enters our body, must be processed and purified. Average water content in an adult organism is about 6

Lipids (fats) belong to a big group of natural organic compounds, insoluble in water but soluble in organic dissolvents such as: diethyl ether, petroleum benzine, chloroform, benzene, acetone etc. To lipids (fats) also belong derivatives of natural l

Carbohydrates (also saccharides or commonly sugars) are organic compounds - multihydroxide alcohols consisting of carbon, hydrogen and oxygen, in which hydrogen to oxygen ratio is the same as in water (H2O) so it equals 2:1. Carbohydrates are in all

Proteins are fundamental elements of build of all tissues of human's body and of many compounds such as: enzymes, hormones, antibodies. Proteins regulate processes of metabolism and many body functions, ensuring their correct state and functioning of