The Cell Theory 1. All organisms are made up of one or more cells. 2. Cells are the basic unit of life. 3. All cells arise from pre-existing cells.

The Cell Theory

1. All organisms are made up of one or more cells.

2. Cells are the basic unit of life.

3. All cells arise from pre-existing cells

All living Things are composed of CELLS

bacteria amoeba

mice

horses flowers

yeast

trees

mushrooms

protozoa diatoms

Viruses are not considered cells!

HIVCold

chicken pox

HIVCold

chicken pox

Cells that EXIST by themselves are called

single-celled organismsamoeba bacteria

Organisms that are made up of more than one cell are

called multicellular organismsplants animals

Other names and spellings

Single-celledSinglecelled

Unicellular

Multi-celled

multicellular

Where do Cells come from?

+ = ?

+ = ?

Spontaneous Generation

+ =

+ =

Spontaneous Generation

+ =

+ =

Spontaneous Generation

All cells come from pre-existing cells in process called

Cell Division

Recite the Cell Theory

1.

2.

3.