IMPORTANCE OF CELLS
IMAGINE..... "If you were one giant cell,.... "
How could you stay alive? Could you get materials like oxygen, food, and remove wastes to all areas of the cell? Or would it be better to have cells--tissues--organs that form tubes (blood vessels) to get materials to all areas? What would happen to you--as a single cell--if your membrane was pierced?
Cells have the ability to specialize to do different jobs for multicellular organisms. Cells can then divide the work to be done to keep the mulitcellular organism alive--growing and developing. IMAGINE a single cell within this mulitcellular organism dying. If this happened, there would be other cells remaining to do the job and keep the tissues, organs, systems, and organism going!