====== CELLULAR BOXES OR 3D CELLS ======

  * cellular black box or function box 


===== CELL BASED ON SHAPES  =====


 * Types of cell
  * 1.cuboidal
  * 2.columnar
  * 3.squamous
  * 4.air filled cells
  * 5.fat filled cells
  * 6.glucose
  * 7.big cell or cell size increases in hypertrophy
  * 8.atrophic cell