This document provides an overview of the Ayurvedic concept of doshas, with a focus on vata and pitta dosha. It defines doshas as the biological elements that form the structural and functional units of the body. The three doshas - vata, pitta, and kapha - originate from combinations of the five great elements. Vata is related to movement and nervous functions, pitta to metabolism and digestion, and kapha to structure. The document describes the characteristics, subtypes, physiological roles and imbalances of vata and pitta doshas.