Where I Could Be…

Circulatory System

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

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

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

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

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

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

“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.

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

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

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

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

Diseases Aneurysm Arteriosclerosis Atherosclerosis Congestive Heart Failure Embolus Hemophilia Leukemia

Diseases Myocardial infarction Phlebitis Varicose veins

THE END !!!