Cell is the living blocks of life. They form the structural 
and the functional unit of our life, that is a group of cell 
forms tissue, a group of tissue forms organ, a group of 
organs form organ system and finally a group of organ 
systems form a complete organism / individual.
And there are two types of cell 
1/ eukaryotic cell ( consists of the plant cell and the animal 
cell )
2/ prokaryotic cell (... I don't know man )