Heart maintains homestasisSupplies oxygen co2 and nutrientsHeart4 chambers2 atria, 2 ventricleThe atria contract at oncefollowed by the ventricles contracting togetherlook at heart is if it was the patients heartflow- RA RV pulmonary trunk lungs LALV aortacoronary sulcus- filled with fatarteries- blood vessels carry away from heartveins- blood vessels carry to the heartcapillaries- connect arteries and veinsthree or four varietiesexchange vessels because thin walls permit exchange between nutrientsCirulatory circuitPulmonary- to and from lungsOxygen poor blood from heart to lungsOxygen rich blood from lungs to heartSystemic circuit- to and from all organs in bodyOxygen poor from organs to heartOxygen rich from heart to organsSuperior vena cava- vein into RA from upper partsInferior vena cava- vein into RA from lower partsValvesTricuspid- right side- three flapsBicuspid- left side- two flapsPulmonary semilunar- b/w LV and pulmonary arteriesAortic semilunar- b/wPericardial sac and cavitySpace to cushion- pericardial spaceFlexible sac that holds itSurrounds hear like a balloonSurrounded by two layers- serous pericardiumVisceral pericardiumParietal pericardiumHeart consists of three layersEpicardium-Visceral layer of pericadriumMyocardium- bulky uscle of the heartEndocardium- endothelium inner layerMediastinum- space where heart is located in the cavityIn between the two lungsSuperior-above the 5 vertebrae and everything in itMiddle- hert and peridcardium sacInferiorMemorize the transverse image of the heartSlight to the left of the midlineSits at an angleRotated slight to the leftMuscle CellsLong cylindrical fibers composed of individuals cells that show branchngMono mucleated- in the centerBegin and end at specialized contact juctions called intercalated discsGap junctions- not common at the ends where they might be pulled apartDesmosomeFascia adherensSatellite cell NOT present no stem cellsNo capacity for replacement or regeneration of damaged cardiac muscle cellsDamaged heart are forever damagedNot under voluntary control, innervated by ANSBulk is the myocardiumTotally dependent on aerobic respirationSemi-rigid connective tissue frame of the heartStabilizes heart contractile cells and valvesSupport muscle cells, blood vessels andVesselsIf shut off anterior interventricular branch of LCA then shut off the blood supply of the left ventricleCalled angle of death or widow makerNo continuation between circumflex of LCA and RCAGreat cardiac vein- runs with anterior interventricular branch of LCA in the coronary sulcusPicking of venous branches and dumps into the coronary sinusGoes into right atrium then (all blood drains into cornary sinus)Only exception is the anterior cardiac sinus dumps directly into RAThree valves that feed into coronary artery in the aortic semilunar valveCardiovascular System 03/25/2010Heart maintains homestasisSupplies oxygen co2 and nutrientsHeart-4 chamberso2 atria, 2 ventricleoThe atria contract at onceofollowed by the ventricles contracting together-look at heart is if it was the patients heart-flow- RA RV pulmonary trunk lungs LALV aorta-coronary sulcus- filled with fatarteries- blood vessels carry away from heartveins- blood vessels carry to the heartcapillaries- connect arteries and veins-three or four varieties-exchange vessels because thin walls permit exchange between nutrientsCirulatory circuit-Pulmonary- to and from lungsoOxygen poor blood from heart to lungsoOxygen rich blood from lungs to heart-Systemic circuit- to and from all organs in bodyoOxygen poor from organs to heartoOxygen rich from heart to organs-Superior vena cava- vein into RA from upper parts-Inferior vena cava- vein into RA from lower parts-ValvesoTricuspid- right side- three flapsoBicuspid- left side- two flapsoPulmonary semilunar- b/w LV and pulmonary arteriesoAortic semilunar- b/wPericardial sac and cavity-Space to cushion- pericardial space-Flexible sac that holds it-Surrounds hear like a balloon-Surrounded by two layers- serous pericardiumoVisceral pericardiumoParietal pericardium-Heart consists of three layersoEpicardium-Visceral layer of pericadriumoMyocardium- bulky uscle of the heartoEndocardium- endothelium inner layerMediastinum- space where heart is located in the cavity-In between the two lungs-Superior-above the 5 vertebrae and everything in it-Middle- hert and peridcardium sac-InferiorMemorize the transverse image of the heart-Slight to the left of the midline-Sits at an angle -Rotated slight to the leftMuscle Cells-Long cylindrical fibers composed of individuals cells that show branchng-Mono mucleated- in the center-Begin and end at specialized contact juctions called intercalated discsoGap junctions- not common at the ends where they might be pulled apartoDesmosomeoFascia adherens-Satellite cell NOT present no stem cellsoNo capacity for replacement or regeneration of damaged cardiac muscle cellsoDamaged heart are forever damaged-Not under voluntary control, innervated by ANS-Bulk is the myocardium-Totally dependent on aerobic respirationSemi-rigid connective tissue frame of the heart-Stabilizes heart contractile cells and valves-Support muscle cells, blood vessels and Vessels-If shut off anterior interventricular branch of LCA then shut off the blood supply of the left ventricleoCalled angle of death or widow maker-No continuation between circumflex of LCA and RCA-Great cardiac vein- runs with anterior interventricular branch of LCA in the coronary sulcusoPicking of venous branches and dumps into the coronary sinusoGoes into right atrium then (all blood drains into cornary sinus)oOnly exception is the anterior cardiac sinus dumps directly into RA-Three valves that feed into coronary artery in the aortic semilunar