1. Circulatory System
Chapter 37

2. Circulatory System
Heart
Blood Vessels
Blood

3. Heart Atrium Ventricles Myocardium Valves
Upper Chambers that receive blood
Ventricles
Lower Chambers that pump blood out of the heart
Myocardium
Powerful heart muscles that pump blood
Valves
Flaps that prevent blood backflow

4. Pulmonary Circulation
Involves the lungs
Start at the RIGHT side of the heart
Blood pumped from the heart to the lungs
At the lungs, blood release CO2 and receives O2

5. Systemic Circulation O2 rich blood goes to the LEFT side of heart
Blood is pumped to the rest of the body
Tissues and cells of the body receive O2 and blood receives CO2 waste
Starts over at the RIGHT side for Pulmonary Circulation

7. Pacemaker
Sinoatrial Node (SA Node) Located at the top of the Right Atrium
Impulse spread from SA Node to fibers around Atria, contracts
Atrioventricular Node (AV Node) picks up impulse
Impulse spreads to fibers around ventricles, contracts

9. Blood Vessels Aorta Arteries Capillaries
Large artery of the heart and leads blood to body
Arteries
Carries O2 rich blood to tissues of body
Pulmonary Arteries carry deoxygenated blood to lungs to become oxygenated
Capillaries
Smallest vessels where O2 and CO2 exchange occurs at the tissues

10. Blood Vessels Veins Brings de-oxygenated blood back to the heart
Valves to prevent backflow and encourage blood to return to the heart
Near skeletal muscles
Muscle Contraction encourages blood to pump back to the heart