What are the Tridoshas?

Vata dosha

The Vata dosha is the most important of the three doshas.

This is for two reasons. First, if Vata becomes imbalanced for long enough and sufficiently enough, it can also cause the other two doshas (Pitta or Kapha) to become imbalanced. It can even cause both Pitta and Kapha to become imbalanced; this is called a Tridoshic imbalance and is the most difficult to overcome. Secondly, Vata is the main driver or mover of the body, including the other two doshas, all the tissues (dhatus) and all of the waste products (malas).

Vata provides the following functions:

..All eliminations: fetus, semen, feces, urine, sweat, and a few others
..Assists with all the various metabolisms in the body (called Agni in Ayurveda)
..Controls all of the various movement of body (both physical & mental),
including such things as respiration, heart beat, motivation and contraction of muscles
..Relays all sensory input from the various sense organs to the brain

http://www.ayur.com/dosha/tridosha.html

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