Prana is that special function of the Cosmic Prana, which supplies the human body with essential oxygen. Its energy flows from the nostrils to the level of the heart. Prana is a flow of energy, governing the thoracic area between the larynx and the top of the diaphragm. It is associated with the heart & organs of respiration together with the muscles & nerves that activate them. It is the force by which the breath is drawn inside. Certain techniques in particular activate Prana Shakti, these are Bhastrika, Nadi Shodhana and Ujjayi Pranayama.