1. The Circulatory System

2. Role
Transportation and exchange of:
Gases
Nutrients
Waste

3. Main Parts Form a closed circuit in which blood circulates : → Heart
→ Blood vessels (arteries, arterioles, capillaries, venules and veins)

4. The heart 4 Chambers: Inside the heart Right atrium Right ventricle
Left atrium
Left ventricle

5. The heart
Contracts to ensure blood circulation throughout body

6. Blood Vessels
Arteries - Carry blood from heart to body or lungs. Capillaries – Thin walled blood vessel where exchanges between blood and cells occur Veins – Carry blood from body or lungs to heart

7. Capillaries

8. Circulation Routes RIGHT SIDE = Pulmonary circulation
O₂ poor blood goes to the lungs
LEFT SIDE = Systemic circulation
O₂ rich blood goes to the rest of the body

9. Pulmonary Circulation

10. Systemic Circulation