Cardiovascular System (The Heart)

RDiovascularsystemfunctions Superior EXTERNALview ofTHEHEART Anterior leftpoint notioncomponentsofthecardiovascularsystem the near thechambersof theheartincludetwoupperatria receiving Blood mor Chambers two lower ventriclespumpingchambers Heartpump r s t f interior Bloodvessels interiorrightpoint leftpoint eneralfunctionstheseprovide transportation Regulation protection tocreatethe pump weneedthefollowing Cardiacmuscle contraction Chambers bloodstorage Valves keepbloodmoving0 direction intristicconductivesystem theelectricalimpulses thatstimulates cardiacmuscleto contract CATIONOfTHEHEARTANTERIORview theheartis located in themediastinum RIGHTATRIUM Therightatriumreceivesblood fromthesuperior inte vena cava the coronary sinus bloodpassesfrom the right atrium totheright vent through thetricuspidvalve Bloodthenpassesfrom the rig ventriclethroughthe pulmonaryvalve into thepulmonary trunk artery t intothelungs LEFTATRIUM Theleftatriumreceivesoxygenatedbloodfromthe 4 pulmonary veins Bloodpasses from the left atrium to the leftventriclethroughthebicuspid mitral valve Bloodpasses from the left ventriclethrough the aorti 0CATIONOFTHEHEART valveintotheaortawhere it's distributedthroughoutthe bo The wall oftheleftventricleismuchthicker than that of i therightventricle µjTMn .g P Thickness ofTHEMYOCARDIUMOFEACHCHAMBER RIGHT VENTRICLE pumpsbloodashorterdistance tothe lungs at lower pressure view LEFTVENTRICLE pumpsblooda longerdistancethrough thebody at higher pressure ERICARDIUM Morepowerfulpump thepericardiumsurroundsprotects Anchorstheheart 3x asthickasrightventricle consistsofanouterfibrouspericardium an innerserouspericardium neserouspericardiumhas2layers HEARTVALVES CIRCULATION OFBLOOD visceralalsocalledtheepicardium Eachof 4valueshelpensureonewayflow of parietal blood byopeningto letbloodthrough t then Thevisceral parietallayersareseparatedbytheserouscavity afluid closingtopreventits backflow edspace Thevalvesoftheheartopen1 Close in responseto parietallayer pressure Change as the heart contracts q Heart pericardial q t a atrioventricularvalves tricuspid bicuspid mitral valves viscerallayer ofserouspericardium between atria ventricle NotionalANATOMYOFTHEHEART S Prevent back now fromthe ventricles into theair 4 Chambers Right left semilunarvalves pulmonary aorticvalves 2Atria betweenventricles arteries ex pulmonary or aorta 2 ventricles Prevent back aow from thearteriesintoventricles 2systems WHYDovalvesopen close Pulmonary opening closingofthe tricuspid mitral valves Systemic A pressureas v A valueopen EyPOINTS Bloodnowacross Allarteriescontaindeoxygenatedblood expulmonaryartery valve Allveinscontainoxygenatedblood expulmonaryveins V qqgq waystrue Diastole systole allarteriescarrybloodawayfromheart allveinscarrybloodtotheheart A atria colorconventions v ventiae Bluedeoxygenatedblood Red oxygenatedblood