The word nadi is derived from the Sanskrit root 'nad', which means 'to flow'.
There are differing opinions regarding the number of nadis in the body:
The Nadi Vijnana mentions that there are 30.5 million, the Shiva Samhita mentions 350000, and the Satchakranirupana states that there are only 72,000 nadis in the body.
Most of the tantric texts accept that there are 72,000 nadis in the body.
