The energy sheath has a subtle physiology of its own, which employs the following aspects:

– subtle energy functions (vayus or pranas),
– subtle energy currents (nadis),
– subtle energy centers (chakras),
– subtle elements (tattvas),
– subtle perceptive and motor senses (tanmatras),
– subtle breath flow patterns (svaras),
– subtle energy points (marmas), and
– subtle brain centers (dalas).