The Circulatory System
Role Transportation and exchange of: Gases Nutrients Waste
Main Parts Form a closed circuit in which blood circulates : → Heart → Blood vessels (arteries, arterioles, capillaries, venules and veins)
The heart 4 Chambers: Inside the heart Right atrium Right ventricle Left atrium Left ventricle
The heart Contracts to ensure blood circulation throughout body http://www.youtube.com/watch?v=JA0Wb3gc4mE
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
Capillaries
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
Pulmonary Circulation
Systemic Circulation