Through the yogic lens, we are much more than just our physical bodies and any of the practices we explore, affect all FIVE bodies. Anna means food. The outermost of the koshas is called the sheath of food, or Annamaya kosha. The next of the koshas is Pranamaya kosha. Prana means energy. It is the vital force related to breath. The next of the koshas is Manamaya kosha. Mana means mind. It is the level of processing thoughts and emotions. The next of the koshas is Vijnanamaya kosha. Vijnana means knowing. It is the sheath of wisdom that is underneath the processing, thinking aspect of mind. Anandamaya kosha is the most interior of the koshas, the first of the koshas surrounding the eternal center of consciousness. Ananda is peace, joy, and love independent of any reason or stimulus. It is simply being.
to learn more about the koshas visit http://www.yogamag.net/archives/1996/5sep96/koshas.shtml