Doshas : they are the principles which are symbolic expressions of physiological activities and pathological derangements.
Vata Dosha: The principle which is responsible for mobility, driving energy ,pulsating movement, All voluntary and involuntary movements of the body, excretion of stool urine flatus, blood circulation and discharge of nerve impulses. Vata occupies lower part of the body and stimulates action all over the body.
Pitta Dosha: Pitta is derived from the word `tap` means to burn by the heat of agni guna. Its functional role is digestion, perception of visual objects, skin complexion and acquisition of knowledge and skills. Pitta occupies the peri umbilical region.
Kapha Dosha : The physiological actions are maintenance of fluids, integrity of joints, stability if the body ,physical strength. Kapha resides mainly in lungs throat, head, joints, nose and tongue.
Prakriti: That which constitutes the natural instincts reflected by the body with respect to both mental and physical properties and functioning. The knowledge of prakriti helps to calculate and design therapeutic measures that should be employed to overcome diseases. kapha prakriti is said to be superior because it dominates with its anabolic activity, enables the person to stand against diseases. Vata prakriti is reckoned inferior because of its catabolic activities, atropy and degeneration. Pitta prakriti belongs to moderate category. Their intense agni digests and metabolises quickly to transform. The samadosha prakriti where all three doshas operate in harmony is appreciated to be the best constitution.