1. HEART RATE LAB Heart Beat Measuring heart rate under different conditions. Do Investigating claims on your own.

2. CIRCULATORY SYSTEM

3. THE CIRCULATORY SYSTEM 5.6 liters of blood being pumped at a time = 2 liters = 1 liter Takes 60 seconds for a blood cell to make a complete circuit of the body Your heart will beat 100,000 times today 35 million beats a year Aorta- diameter of garden house, capillaries as thin as a hair

4. FUNCTIONS OF CIRCULATORY SYSTEM Transportation Oxygen Nutrients Removal Wastes from tissues The “Blood Mobile”

5. WHAT’S IN YOUR BLOOD? Plasma Liquid part of the blood 90% water White Blood Cells Fight infection Engulf bacteria cells Red Blood Cells Most common blood cells Hemoglobin transported Carries oxygen Platelets Cell fragments Helps clot blood

6. BLOOD VESSELS Artery “away” Blood pushed away from heart Blood vessel where a pulse can be felt Delivers oxygen-rich blood to capillaries High pressure Capillaries Smallest blood vessel Exchange materials, from blood to tissues and tissues to blood  O 2, CO 2, waster, nutrients Veins Contains valves Brings wastes to the heart and lungs Low pressure Varicose Veins  valves no longer work

7. THE HUMAN HEART All Muscle

8. YOU’VE GOTTA HAVE HEART Heart failure is the leading cause of death in men and women ~ 800,000 Americans a year of a heart attack ~ 500,000 Americans who have already had a heart attack have another one every year Heart disease costs in America ~ $108.9 billion

9. YOU’VE GOTTA HAVE HEART Risk Factors Inactivity-53% Obesity- 34% High Blood Pressure- 32% Cigarette Smoking- 21% High Cholesterol- 15% Diabetes- 11%

10. EXTERNAL VIEW pulmonary artery pulmonary vein coronary artery left ventricle right ventricle inferior vena cava right atrium pulmonary vein aorta superior vena cava Pericardium

11. INTERNAL VIEW Superior Vena Cava Inferior Vena Cava

12. INTERNAL VEIW Right Atrium

13. INTERNAL VIEW Right Ventricle

14. INTERNAL VIEW Pulmonary Arteries

15. INTERNAL VIEW Left Pulmonary Veins

16. INTERNAL VIEW Left Atrium

17. INTERNAL VIEW Left ventricle

18. INTERNAL VIEW Aortic arch Aorta

19. INTERNAL VIEW Bicuspid Valve Tricuspid Valve Semilunar Valves Septum

20. NODES Natural pacemakers Sinoatrial Node (SV node or SA node) Cardiac muscle mass on top of right atrium Primary generator regular electrical impulses of the heart Controls pulse, sends it to AV node Atrioventricular Node (AV node) Secondary response, controls contraction Delays signal, prevents simultaneous contraction Artificial Pacemakers Atrial Fibrillation Electrical signals and impulses occurring in places other than the nodes Prevents the right atrium from filling up with blood, body is deprived of blood.

21. TYPES OF CIRCULATION Two types Systemic (greater) Circulation Pulmonary (lesser) Circulation Systemic Part of circulation that carries oxygenated blood away from heart to the rest of the body. Which side of the heart pushes the blood out? Which vessel carries oxygenated blood away?

22. TYPES OF CIRCULATION Pulmonary circulation Blood flow between heart and lungs. Primary job is to exchange O2 and CO2 In this way, it keeps systemic circulation on track