Ayurveda.......

Ayurveda is the science and knowledge of life. It is composed of two words ayu-life , veda-knowledge. That is , knowledge of life. Ayurveda is as old aa vedas,about five thousand years . It is a medical science existed in this country , when no other systems were in existence in the world . It is upaveda of atharvana veda . Te father of morden plastic surgery is susruta of ayurveda , it is aimed at not only curing diseases but also at preventing them. 
The man is an epitome of the universe . He is a microcosm of the macrocosm of the universe . The universe consists of prithivi(earth), Ap ( water), Tejas(fire ), Vayu(air), Akasha(space or ether). The human mind and body are also made made up of these pancha bhutas. The body's growth development and diseases are depending on tridosha viz. Vata, Pitha, Kapha. These are also made up of 5mahabutas in different propotions . Vata is composed of space and air bhutas . Pitta is composed of fire and water bhutas. The water and earth buthas are in predominance in kapha. Vata is connected with nervous system and it regulates all the movements and activities of the body and pitta is responsible for metabolism and body's heat and digestion of food. The kapha aids in movement for structure and maintenance and growth of the body. 
Health ia defindedin Ayurveda as a atate of balance of physical , mental and spiritul health. It is science of self healing.

References , Dr,T.L. Devaraj's Ayurveda , the complete handbook .
Dr. Seela Fernando's Herbal Food and Medicines in Sri Lanka .