1. Circulation Count the number of times your heart beats in one minute.
What do heartbeats do?
Why is it important for your heart to pump blood?

2. Circulation

3. Circulation

4. Circulation

5. Circulation

6. Circulation

7. Circulation Blood Vessel Function Structure of Wall Artery 3 layers:
Inner-epithelial tissue
Middle-muscle
Outer-connective tissue
Carries oxygen away from the heart to the rest of the body
Capillary
Single layer of epithelial cells
Exchange of materials between cells and blood
Vein
Epithelial cells
Connective tissue
Smooth muscle
Carries deoxygenated blood from the body to the heart