Class Notes (1,100,000)
CA (650,000)
York (40,000)
KINE 2031 (200)
Lecture 4

KINE 2031 Lecture 4: circulatory system 4


Department
Kinesiology & Health Science
Course Code
KINE 2031
Professor
Neil Smith
Lecture
4

This preview shows pages 1-3. to view the full 10 pages of the document.
HumanAnatomyKine2031
CirculatorySystem
● Cycle
○ Body
○ IVC/SVC/Coronarysinus
○ Rightatrium
○ ThroughRatrioventricularvalve(tricuspid)
○ Rightventricle
○ ThruPulmonarysemilunarvalve
○ Pulmonaryarteries
○ Lungs
○ Pulmonaryveins
○ Leftatrium
○ ThroughLatrioventricularvalve(bicuspid/Mitral)
○ Leftventricle
○ Thruaorticsemilunarvalve
○ Aorta
○ Body
● Functionsofcirculatorysystem
○ Transport
■ Heartandbloodvesselssupplyoxygenandnutrientstocells
■ Alsotransportshormonesanyingesteddrugs
■ Vesselsconstrictordilatetoensurebloodgetstoareasthatneedit
most(exercisemmvsGI)
○ Wasteremoval
■ Cellularwaste
■ Metabolicwasteproductsincludingcarbondioxide
○ Temperaturemaintenance
■ Shuntbloodbyconstrictingordilating
■ Ifbodyneedstodissipateheat,bloodvesselsnearskindilatetoallow
fluidstodiffuseout(thuscoolingthebodythroughsweat)
■ Ifneedtoconserveheat,vesselsinbodycoredilateandblood
shuntedtocoretomaintainheat
○ Fluidbalance
■ Constantexchangeoffluidbetweenbloodplasmaandinterstitialfluid
■ Bloodcantakeonmorewaterorreleaseittocellstomaintainproper
fluidbalancesaroundcellsandbloodpressureinheart
● Basicorganization
○ Generalizedpathwayofblood
■ Awayfromheartbyarteriesbranchuntilarterioles
■ Capillarynetwork(gasexchange)
■ Venulesmergetoveins
■ Joinandformsuperiorvenacava,inferiorvenacavaorcoronarysinus
(isdrainagefromheartitself),alongthewaythey'llalwayscometo1
ofthese3becausethat'showitgetsbackintothehearttheright

Only pages 1-3 are available for preview. Some parts have been intentionally blurred.

atriumsoitcangetpumpedtorightventriclethenpumpedtothelungs
andgetreoxygenatedandreused
■ Generalizationisthateverythingleavingtheheartisanarteryexcept
thesetofarteriesthatleavefromtherightventriclethatgotothe
lungstogetoxygenatedblood(makingitdeoxygenated)
■ Size(largesttosmallest)
● Arteriole
● Capillaryjoinsarterialsystemtovenussystem
● Venule
■ Venulesmergetobecomeveinsandformsuperiorandinferiorvena
cava,ALLvenussupplyexceptcoronarysinuswilljoinintothese2
structures
■ Heartlungs=arteries
■ Lungsheart=veins
■ Wheredocapillarynetworksexist
● Inthebodybutitdoesn'tgetreenergizingwithoxygen
becausebodyusesit(i.einorgans)
● Inthelungs
● Youhavegasexchangewherevertheeffectoris,whereveryou
takeoxygentoyouhavetohaveacapillarynetworksovessels
cangetthinenoughtohavethingsdiffuseacrossthem
■ Rightisdeoxygenated(Blue)
■ Leftisoxygenated(Red)
● Locationofheart
○ Inmediastinum
■ centerlocationinthethoraxboundbysternuminthefrontand
vertebralcolumninthebackandbetweenthelungs 
○ Pericardium/pericardialsac
■ adoublelayeredmembrane
● Layerssurroundingtheheart(superficialtodeep)
○ Pericardiumhas2layers:parietalandvisceral
○ Parietalpericardiummembranes
■ Fibrouspericardium
● Protectsheart
Helpsanchoritinthemediastinum 
■ Serouspericardium
● Serousmeansitproducesserousfluidwhichhelpsstructures
moveeasilyagainsteachother 
○ Pericardialcavity
Aspacesandwichedbetween2serousmembranestoreducefriction 
○ Visceralpericardiummembranes
■ Akavisceralserouspericardium;akaepicardium
○ Myocardiumcardiacmuscle
■ Contractiletissueoftheheart
○ Endocardiumepithelialcelllayer
■ Alsolinesbloodvessels

Only pages 1-3 are available for preview. Some parts have been intentionally blurred.

● Heartstructure
○ NOTE:4valvesoftheheart,wehave3tricuspidvalvesand1bicuspidvalve
■ Martial(bicuspid)leftatrioventricularvalve;controlbloodfromatriato
ventricles;betweenleftatriumandleftventricle 
■ Tricuspidvalverightatrioventricularvalve;controlbloodfromatriato
ventricles;betweenrightatriumandrightventricle 
■ Tricuspidvalvepulmonarysemilunarvalve;controlbloodoutof
ventricles;betweenventriclesandvasculatureatthebaseof
pulmonaryarteryfromrightventricletolungs
■ Tricuspidvalveaorticsemilunarvalve;controlbloodoutofventricles;
betweenventriclesandvasculatureatthebaseofaortafromleft
ventricletoaorta
● Openingstocoronaryarteries;whenleftventriclecontacts,
relaxesandbloodflowbackinaorta=supplycoronaryartery
whichsuppliesheart 
● Whenvalveisclosedyougetalittlebitofbackflowandthe
pressureismuchlesssoitcanfeedthecoronaryarteries
whichcansupplyittothecardiacmuscle 
Rightatrium
■ Bloodfrombodycomesintorightatrium
■ Takessupplyfromsuperiorandinferiorvenacavathatbringblood
backtoheart
Fossaovalisleftoverfromwhenyouwereababytopassblood
acrossatriumsbecyouwon'tpassittothelungs
Interatrialseptumleftoverfromwhenyouwereababypassblood
acrossatriumsbecyouwon'tpassittothelungs
○ Rightventricle
Rightatrioventricularvalve(tricuspid)willhelpyoupassintotheright
ventricle,thisisatricuspidvalveheldintoplaceby
chordaetendineae
anchoredto
papillarymusclesthathelpcontrolthewaythevalvesare
working
■ Contractandpushbloodthroughpulmonarysemilunarvalve(alsoa
tricuspidvalvetohelppreventbackflowofblood)
■ Aftersemilunarvalvewegoupinto
leftandrightpulmonaryarteries
(theyaredeoxygenated,bloodhasnotgonetolungsyet)
Interventricularseptum
■ Isamusclewallthatseparatesyourtwoventricles
Leftatrium
■ Youwillhavegasexchangeincapillarynetwork.Vesselswillbring
oxygenatedbloodbacktotheheart(vesselsthatbringbloodtothe
heartareknownasVEINS)
Rightandleftpulmonaryveinscarryoxygenatedbloodanddumpinto
leftatrium 
Leftventricle
You're Reading a Preview

Unlock to view full version