1. All living organisms are composed of cells. This means that every living thing, from the smallest bacteria to the largest whale, is made up of one or more cells. This is the most fundamental principle of the cell theory.
2. Cells are the basic unit of structure and function in living organisms. This means that cells are not only the building blocks of life, but they are also responsible for carrying out all of the essential life processes, such as metabolism, growth, and reproduction.
3. All cells arise from pre-existing cells. This means that cells don't spontaneously appear, but rather they are produced by the division of other cells. This is a key principle in understanding the continuity of life.
In summary, the cell theory tells us that cells are the fundamental units of life, they are responsible for all life processes, and they are derived from other cells.
