This document discusses various cleansing techniques (kriyas) in yoga. It describes 6 major kriyas - Dhauti, Basti, Neti, Trataka, Nauli, and Kapalabhati. Dhauti cleanses the upper GI tract using techniques like vomiting or using a bamboo stick or cloth. Basti cleanses the lower GI tract. Neti cleanses the nasal passages using water or thread. Trataka focuses on eyesight. Nauli involves contracting abdominal muscles. Kapalabhati cleanses the lower respiratory tract. Regular practice of these kriyas can help balance doshas, remove toxins, and promote overall health and awareness.