Why is the cell called a structural and functional unit of life?

Cell:

1. The smallest and most fundamental unit of life is a cell.
2. The cell was found in 1665 by Robert Hooke.
3. The cell has been described as the most fundamental structural and functional unit in all living forms, including bacteria, plants, animals, and humans.
4. Unicellular organisms are able to live independently and carry out the fundamental tasks of life.
5. Independent living cannot be guaranteed if a cell's structure is incomplete.
6. As a result, the cell is the basic structural and functional unit of all living things.
7. Cells are the most fundamental components of the human machine.
8. For example - red blood cells carry oxygen around the body, and white blood cells are part of the immune system.