1. Cell Theory Developed by 3 people: Theodor Schwann Matthias Schleiden
Rudolf Virchow

2. Cell Theory Parts All living things are made of one or more cells
Amoeba (one celled organism)
Human red blood cell
Plant cell

3. Cell Theory Cell is the basic unit of life
- Smallest part which can live on its own

4. Cell Theory
3. Cells only come from other cells

5. Cell Theory Energy flow happens in all cells
- (They get food or energy from somewhere in their environment. Ex. : sun, eating other cells, or volcanic gases)

6. Cell Theory
5. Heredity information (DNA) is contained in all cells and passed from cell to cell.

7. Cell Theory
6. All cells are made of the same basic chemicals

8. Why Viruses are Not Alive
Does have DNA, but….
Can not replicate on its own.
Does not have any organelles
Not made up of cells
Flu virus