The physical body is ensheathed by an auric field in which seven major chakras (invisible to the naked eye) are present. The seven chakras are Sahasrara, Ajna, Visuddha, Anahata, Manipura, Svadhiṣṭhana and Muladhara.
Each chakra is associated with an endocrine gland and controls specific organs. Each svara resonates with one major chakra. When each note is sung, concentrating on the Sruti, the vibration of the corresponding chakra can be experienced.