Dear Friends, We have all received our bodies and lives from the chromosomes contributed by our mother and father. These chromosomes contain genes that govern many things, including -our skin color, -the size of our nose, -the color of our eyes' irises, -our height, -our body type, -the folds of our brain, -and our gender. We call these genes. Cells combine to form tissues. The combination of tissues creates organs. In this state, there are three important rules that cells in the body follow. The first rule: Cells should only be created at the rate required for the specific tissue. The second rule: When a cell grows and comes into contact with a neighboring cell, its growth should automatically stop. The third rule: Once its lifespan is over, it should self-destruct, thereby making way for the next cell to form.