According to the cell theory, all organisms are made of cells.
What is a cell?
A cell is the smallest unit that can live on its own. Cells make up all living organism and their tissues.
Cell Theory: a theory which states that cells are the most basic unit of life found in single-celled and multi-cellular organisms.
1. All living things are made up of one or more cells and their products
2. The cell is the simplest unit that can carry out all life processes on its
own
3. All cells come from other cells; they do not come from non-living matter