1. Functional Anatomy of the Cardiovascular System

2. Objectives 0 Identify and discuss the structure and function of 0 Heart 0 Blood vessels 0 Blood

3. Structure 0 Enclosed in lubricated sac (endocardium) 0 Attached to the thorax by connective tissue (pericardium) 0 Protected by 0 Ribs 0 Sternum 0 diaphragm

4. Structure 0 Muscular organ (myocardium) 0 Size of average fist 0 Structure of Heart 0 Shell-like pump 0 4 chambers 0 4 valves

5. Structure of Heart 0 L & R Atrium 0 Top two chambers 0 Receive blood from the body and lungs 0 L & R Ventricles 0 Bottom two chambers 0 Pumps blood to the body and lungs 0 Valves (4) 0 Direct blood flow 0 Keep it moving in one direction

6. Heart 0 Function of Heart 0 Provide O2 to the cells of the body through the circulation of blood 0 Circulatory System 0 Arteries 0 Capillaries 0 Veins

7. Circulatory System 0 Arteries 0 Tough on outside 0 Smooth on inside 0 Carry O2 rich blood from heart to capillaries in lungs and body 0 Arteries 0 Expand when heart contracts 0 Contract when heart relaxes to help push blood through circulatory system

8. Circulatory System 0 Capillaries 0 Thin and fragile mesh- like network of vessels 0 Site of exchange for O2 and carbon dioxide 0 Deliver waste-rich blood to veins 0 Veins 0 Thinner walls than arteries 0 Transport waste-rich blood back to heart and lungs 0 Contain valves to insure blood flows in one direction 0 Help blood move against the force of gravity

9. Circulatory System 0 Pulmonary circulation 0 Blood flow to and from lungs 0 Coronary circulation 0 Branch off aorta 0 Supply blood to heart and muscle 0 Systemic circulation 0 Blood flow to all other organs and extremities

10. Blood 0 Red blood cells 0 Cary O2 0 White blood cells 0 Phagocytosis 0 Immediate immune system response 0 Infection 0 Platelets 0 Clotting 0 Lose platelets lose the ability to clot quicker

11. Blood 0 BP maintains blood flow to 0 Brain 0 Internal organs 0 Muscles 0 Low blood pressure 0 Brain and other organs don’t receive adequate blood supply 0 High blood pressure 0 Over time will damage capillaries

12. Blood Flow 0 Left atrium 0 Receives O2 rich blood from the lungs by pulmonary veins 0 Left atrium pumps blood through mitral valve to left ventricle 0 Left ventricle 0 Pumps O2 blood through aortic valve to aorta 0 Aorta 0 Branches into smaller arteries that transport blood to heart, other organs and extremities 0 Arteries 0 Connect to capillaries where O2 and CO2 are exchanged 0 Waste is also picked up from the lymph system

13. Blood Flow 0 Capillaries 0 Connect to veins 0 Veins 0 Transport blood back up to the heart and lungs 0 Blood enters right atrium through the superior and inferior vena cava 0 Right atrium pumps blood through tricuspid valve to right ventricle 0 Right ventricle pumps blood to lungs through pulmonary arteries