Váyu (Vata) may be understood as nerve force, electro-motor, physical activity or that, which is responsible for motion. It is commonly called air. The root, ‘va’ means to spread. In Western terms, it is the electricity setting the organism into motion, maintaining the equilibrium between Pitta and Kapha (inerts).
Váyu relates to the nerve-force.
It is responsible for all movement
in the mind and body.
The movement of Váyu even regulates the
balance of Pitta and Kapha.
Pitta relates to internal fire, bile, body heat, digestive enzymes, physio-chemical, biological, metabolic and endocrine systems. It is responsible for digesting the chyle into a protoplasmic substance like sperm and ovum.
Kapha fills the intercellular spaces of the body as connective tissue. Examples of these tissues include mucus, synovial fluid, and tendons. Kapha is responsible for the gross structure of the body (solid and liquid/phlegm-plasma). Each person is made up of a combination of these elements.from: healingwaysresearch
Váyu is also found in (governing) the waist, thighs, ear, bones, and skin. Pitta also governs the navel, sweat, lymph, blood, eye, and skin. Kapha additionally controls the chest, throat, head, bone joints, small intestine, plasma, fat, nose, and tongue.
The three doshas (Váyu, Pitta, Kapha) exist throughout the entire body, in every cell, yet are predominant (their sites of origin) in the colon, small intestine, and stomach, respectively. Some authorities say that Váyu primarily resides below the navel, Pitta from the navel to the heart, and Kapha, above the heart.