Other two doshas- pitta and kapha are dependent on vata only for their movement. Vata controls all the organ systems of the body and help in smooth functioning. Ingestion of food, speech, respiration, digestion, and expulsion of waste material in the form of feces is facilitated by Vata only. Nervous system is also governed by vata dosha.
Kapha comprises predominantly of water and earth elements. It helps in smooth execution of various functions in the body, viz. Production of digestive juices, lubricating various joints and membranes in the body in the form of synovial fluid and cerebrospinal fluid etc.
Doshas are the principle metabolic forces, and they control the physiological processes and psychological behavior of an individual.