IntroductionWhat are the parts of your house?
Rooms, halls, kitchen.....
What are these made of, in turn?
Hmmm... Walls, Floors and roofs....
And again, what about these walls etc.?
Err... Bricks, cementor clay.
Fine. Ultimately, these raw materials are the basic units of your house. Similarly, the basic units of your body - and of course, all living organisms - are called Cells.
Thus, a biological cell is defined as the basic structural and functional unit of life.