Cells are the basic structural and functional unit of life. The term cells was first coined in 1665 by a British scientist Robert Hooke. He was the first person to study living things under a microscope and examined a thin slice of cork under a microscope and observed honeycomb-like structures. Robert Hooke called these structures as cells.
The cell is the structural and building block of life. All living organisms in this universe are made up of cells. They are either unicellular or multicellular. Cells present in plants are different from cells present in animals. The cell structure, size, shape, and organelles present in various kinds of cell are different. Each cell organelle has its own characteristic behavior and function. The whole biology of an animal or plant is determined by its cell.