1. Cells
The Basic Units of Life

2. Two types of cells 1. Prokaryotic – cells that do not have a nucleus
Example: Bacteria
2. Eukaryotic – cells that have a nucleus
Example: Almost all cells other than bacteria.

4. Prokaryotic vs. eukaryotic

5. Cell –smallest unit that can carry on all life processes
All living things have at least one cell
Humans have about 200 different types of cells.
Tissue- a group of cells that work together to perform a specific job in the body.
Examples: Blood, Fat, and Muscle

6. Organ- two or more tissues working together to perform a specific job.
Example: Heart, Lung, and Kidney

7. Organ Systems- organs working together in groups to perform particular jobs.
Example: Digestive System and Circulatory System

8. Organism- anything that can live on its own.
Unicellular Organism – an organism that is single celled.
Multi-cellular Organism – an organism that is made up of two or more cells.
Organism
Circulatory System

9. examples Cell Tissue Organ Organ System 1.heart muscle cells
1. Circulatory System
2. stomach muscle cells
2. stomach muscle
2. stomach
2. Digestive System
3. lung muscle
cells
3. lungs
3. Respiratory System