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Human Skeletal System The Skeletal System

             DIGESTION & ABSORPTION All the living organisms require the presence of energy to do various functions of life.  They get this energy from the food they eat.  Food is also needed for growth and development of the body.  Nutrition is defined as, the substance in total from which an organism derives its energy to do work and other materials for its growth, development and maintenance of life.     DIGESTION :-                        “ The breaking down of complex and insoluble organic substances such as carbohydrates, proteins and fats into simpler and soluble substances like glucose, amino acids and fatty acids respectively so that they can be easily absorbed into the body is known as digestion.  This is a hydrolytic process and is carried out by various enzymes.”             Aliment...