Abstract: A display apparatus is provided which is divided into two frames. On one frame is pictured a human body with the spinal column thereof formed of a plurality of vertebrae. The human body displayed also includes a plurality of organs and the like which are associated, according to Gray's Anatomy, with the various vertebrae. Push-button controls are positionally related to the vertebrae and when operated could cause an illumination of the related organs. A further series of push-button controls are provided in order that the organs can be separately illuminated as desired. Arrangement is made so that the illumination can be steady state or pulsating fashion selectively. On the second of the aforesaid frames is visually displayed a set of front and rear views of the human body and the related musculature. Push button controls are arranged for the illumination of the various muscles. These latter push-button controls are coupled to one of the aforesaid sets of controls for interaction therewith.