Cell in Biology

Cells are fundamental unit of life. All living organisms composed of cells. There are many types of cells. Cells are functional.
The contraction of muscle cells moves your eyes as you read this page, when you decide to close or leave this page , nerve cells will transmit that decision from your brain to the muscle cells of your hand for  mouse or key pushing movement. It shows that every thing performed by organisms is basically the cellular system. 

• Discovery of Cell   (will be soon updated)