Relate tissues to organs and organ systems. Give an example.

Cell is the basic functional and structural unit of the living organism. All living organisms are made of cells and cell also shows the division of labor in the organism.

Cell unite together to perform a particular function is known as tissues. Tissue combine together to form an organ and different organs work together to form an organ system. For example: muscle tissue combine together to form the muscular organ. Muscular organ with different organ form the organ system.