CV_System_v2

CV_System_v2 - Cardiovascular System EXSS 175 Human Anatomy...

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Unformatted text preview: Cardiovascular System EXSS - 175 Human Anatomy Cardiovascular System Strong emphasis placed on this system Imperative knowledge base for ALL exercise based coursework within the department (phys, ex phys, exercise prescription) Focus on: Heart Vessels Blood Circulation Peripheral circulation (blood supply for the extremities) Cerebral circulation (blood supply for the brain) Coronary circulation (blood supply to the heart muscle) Hepatic portal circulation (role of liver and other abdominal organs) Fetal circulation Clinical assessment of cardiac function (scattered throughout) Heart General Central component of CV system Functions to propel blood through vessels Hollow, cone-shaped organ the size of a persons fist Heart pumps over 1 million gallons per year. Through over 60,000 miles of blood vessels Location of Heart Located in the mediastinum anatomical region extending from the sternum to the vertebral column, the first rib and between the lungs Pericardium Membrane surrounding and protecting the heart Confines while still allowing free movement 2 main parts Fibrous pericardium tough, inelastic, dense irregular connective tissue prevents overstretching, protection, anchorage Serous pericardium thinner, more delicate membrane double layer (parietal layer fused to fibrous pericardium, visceral layer also called epicardium) Pericardial fluid reduces friction secreted into pericardial cavity Layers of the Heart Wall 1. Epicardium (external layer) Visceral layer of serous pericardium Smooth, slippery texture to outermost surface 1. Myocardium 95% of heart is cardiac muscle 1. Endocardium (inner layer) Smooth lining for chambers of heart, valves and continuous with lining of large blood vessels 4 Chambers of Heart (receives blood from) Two superior chambers (receiving chambers) Right Atrium Superior & inferior vena cava, coronary sinus Left Atrium Four pulmonary veins Separated by interatrial septum Two inferior chambers (pumping chambers) Right Ventricle Right atrium Left Ventricle Left atrium Separated by interventricular septum Chambers of Heart Valves of Heart Prevent backflow of blood Atrioventricular and semilunar valves open/close alternately (i.e. AV open/SL close) Atrioventricular Valves: Prevent backflow within heart Tricuspid (right side) Located between right atrium and right ventricle Bicuspid/Mitral (left side) Located between left atrium and left ventricle Valves of Heart Semilunar Valves: Prevent backflow into...
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This note was uploaded on 11/16/2011 for the course EXSS 175 taught by Professor Zinder during the Fall '08 term at UNC.

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CV_System_v2 - Cardiovascular System EXSS 175 Human Anatomy...

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