According to Ayurveda all objects in the universe including human body are composed of five basic elements (Panchamahabhutas) namely, earth, water, fire, air and vacuum (ether). There is a balanced condensation of these elements in different proportions to suit the needs and requirements of different structures and functions of the body matrix and its parts. The growth and development of the body matrix depends on its nutrition, i.e. on food. The food, in turn, is composed of the above five elements, which replenish or nourish the like elements of the body after the action of bio-fire (Agni). The tissues of the body are the structural entities whereas humours are physiological entities, derived from different permutations and combinations of Panchamahabhutas.