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Transcript
The Heart 1 The heart=a muscular double pump with 2 functions Overview The right side receives oxygen-poor – sends to lungs to oxygenate Its left side receives oxygenated blood from lung, sends to rest of body 2 Two circulations Systemic circuit: blood vessels that transport blood to and from all the body tissues Pulmonary circuit: blood vessels that carry blood to and from the lungs 3 Heart’s position in thorax 4 5 CXR (chest x ray) Normal male 6 Chest x rays Normal female Lateral (male) 7 Starting from the outside… Pericardium -outer membrane enclosing the heart Without most of pericardial layers 8 Layers of the heart wall Epicardium- outer layer, protects the heart by reducing friction Myocardium- consists of cardiac muscle tissue, pumps heart Endocardium- inner lining of the heart, contains blood vessels and elastic fibers 9 10 Layers of pericardium and heart wall 11 Chambers of the heart sides are labeled in reference to the patient facing you Two atria Right atrium Left atrium -------------------------------------------------------------------------------- Two ventricles Right ventricle Left ventricle 12 Septum Interatrial Septum- Wall separating right and left Atria Interventricular Septum- Wall separating right left ventricle 13 14 Function of AV valves 15 16 Superior Vena Cava Vein that carries deoxygenated blood from upper body to the Right Atrium. Such as arms, neck, and head. 17 Inferior Vena Cava Vein that carries deoxygenated blood from lower body to the Right Atrium. Such as legs and lower torso 18 Pulmonary Artery Carries blood from Right Ventricle to the lungs to be oxygenated Splits into Right and Left for each lung. 19 Pulmonary Veins Total of 4 Pulmonary Veins (2 from each lung) Carries oxygenated blood from lungs back into the heart’s Left Atrium 20 Aorta Arched artery from Left Ventricle that supplies body with oxygenated blood Ascending arteries supply upper body Descending supplies lower body 21 Valves Pulmonary Valve Connects Right Ventricle to Pulmonary artery 22 Valves Aortic Valve Connects Left Ventricle to Aorta 23 Valves Tricuspid Valve Boundary between right Ventricle and atrium 24 Valves Mitral Valve Connects Left Ventricle and Atrium 25 26 more on valves 27 28 12 lead EKG 29 Artificial Pacemaker 30 Embryological development during week 4 (helps to understand heart defects) (day 23) (day 28) (day 24) Day 22, (b) in diagram, heart starts pumping 31 Simplified flow: print and fill in details 32 another flow chart Veins on heart Right and Left 33