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LOCATIO\IN * Geneval cation * - in mediastinum - within pericardial cavity ~ perween pleuval cavities posterior = esophagus + tathea * Membrane : pericavdium Glandular tissue = thymus gland INTERNAL [STRUCT WRE Rignt atrium “ReCeIVES deoxygenaied blood - supertoy Vena Cava + ~ infevtoy vena Cava : ~ coronary sinus + Wear+ Let ottrium “Receives oxy genared blood ~ pumonary Veins head, neck, upper £xtvemities lower extve mites smeite. esophagus eet palmonary +unk veka env whos parietal pleura, Weed tung pericardium apex YA olan Systemic circulation: Supplies organs with O, pulmonary civewlation : restock blood 02 Rignt ventvicule “Pulses deoxygenated blood ~ pulmonary trunk Left ventricule * Pulses oxygenated blood - GOTO. THicKNess: IN > RN > LA > RA » Beating, Aart Syncytior Gfanciional units) atrial syncytium ATRIA NENTRICULES contvact — relaxation cont yack Ventricular syncytium > Contracting Cells rcells generate eectrical Signal avery Cell nds the capacity to generate an eiectrical potential tout ty, Create On eitctrical | signal that Spreads inrarventriculay |” septum * AV bundle = only CARDIAC CONDUCTION! SYSTEM + SA node + genevate signal most rapidly “vignt atvium, entyy of superior vena Ccavo- + AV node + /lo™ sec delay of signal % time fov atrial contyaction - atria) ventricules junction connection between atvia-ventvicules Bundle vranches Crignt/ left) Puvkinge fibers + 2xrenSive fibers branching - ape, Jpuemaxer 
