Answer:
A cell is the structural and functional unit of life. It is the basic unit of all living organisms and is capable of independent existence. Cells carry out all of the vital life functions, such as metabolism, growth, reproduction, and response to stimuli. The structure of a cell is closely related to its function, and different types of cells have specialized structures that allow them to carry out specific tasks. For example, muscle cells have long and thick filaments, whereas nerve cells have many branches and long axons. Together, cells work together to form tissues, which in turn form organs, and ultimately make up the entire organism.