2. Where I Could Be…

3. Circulatory System

4. Transportation system Transports oxygen and nutrients to body cells Carries carbon dioxide and metabolic materials away Consists of heart, blood vessels, and blood

5. The Heart It’s “ The Pump ” A Hollow Organ Located Between Lungs – behind sternum – above diaphragm Septum –muscular wall separating heart into right and left sides

6. Three Layers of Tissue Endocardium –smooth, inside lining –allows for the smooth flow of blood Myocardium –middle, muscular layer –thickest layer Pericardium –double layered membrane sac –covers outside of heart

7. Four Chambers of the Heart Right Atrium (BLUE) Right Ventricle (BLUE)/destination lungs Left Atrium (RED) Left Ventricle (RED)/destination body cells

8. Valves (doors with one-way openings) Tricuspid valve Pulmonary valve Mitral Valve (Bicuspid) Aortic Valve

9. Heartbeat Cycle (Process of filling & emptying) Diastole (heart relaxation) Systole (heart contraction) Atria contract Atria relax Systole begins Ventricles contract

10. “The Plumbing” Aorta supplies arteries that oxygenate the walls of the heart with O 2 Coronary Arteries Heart Attack occurs when these vessels are blocked.

11. Conductive Pathway Sinoatrial node (SA)/pacemaker Atrioventricular node (AV)/relay station Bundle of His/(R) & (L) Bundle Branches Purkinje Fibers/generates contraction of ventricles

12. Blood Vessels Arteries (away from heart) –Aorta –Arterioles Capillaries Veins (toward heart) –Venules –Superior Vena Cava –Inferior Vena cava

13. Blood Composition 4-6 Quarts of Blood (average adult) Plasma (90% water) Cells –Erythrocytes –Leukocytes –Thrombocytes Donate Blood!!!

14. Diseases Anemia –Iron deficiency –Aplastic –Pernicious –Sickle Cell

15. Diseases Aneurysm Arteriosclerosis Atherosclerosis Congestive Heart Failure Embolus Hemophilia Leukemia

16. Diseases Myocardial infarction Phlebitis Varicose veins

17. THE END !!!