In Ayurveda, the concept of srotas has been mentioned very specifically. It has given importance both in health and disease. It is defined as the channel or structure through which sravanam karma i.e. flowing, moving, oozing and permeation of different constituents & nutrients of the body takes place. These are also called as srotoamsi. There are thirteen abhyantra srotamsi, each of which relates to specific organs, and there are 9 bahya srotoamsi in males and 11 in females. Each srotas has it moola sthana. Vitiation of moola sthana can also leads to vitiation of respective srotas. The factors which cause vitiation of srotas are called as sroto dusthi karanas and the lakshanas which manifest are called as sroto dusthi lakshanas. There are four important sroto dusthi lakshanas i.e. sanga, vimargagamana, atipravrutti, and siragranthi. Among thirteen abhyantara srotamsi pranavaha srotas is one among them. It is a vital input capability structure maintaining the life. 

Keywords: Pranavaha Srotas; Sanga; Vimargagamana; Atipravrutti; Siragranthi.