The Cosmic Vibration, or Aum, structures all physical creation, including man's physical body, through the manifestation of five tattvas (elements): earth, water, fire, air, and ether (q.v.). These are structural forces, intelligent and vibratory in nature. Without the earth element there would be no state of solid matter; without the water element, no liquid state; without the air element, no gaseous state; without the fire element, no heat; without the ether element, no background on which to produce the cosmic motion-picture show. In the body, prana (cosmic vibratory energy) enters the medulla and is then divided into the five elemental currents by the action of the five lower chakras (q.v.), or centers: the coccygeal (earth), sacral (water), lumbar (fire), dorsal (air), and cervical (ether). The Sanskrit terminology for these elements is prithivi, ap, tej, prana, and akasha.