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AAnnaattoommyy ooff tthhee 
HHeeaarrtt 
SSaalltt LLaakkee CCoommmmuunniittyy CCoolllleeggee 
HHuummaann AAnnaattoommyy LLaabboorraattoorryy 
2200--11
OObbjjeeccttiivveess 
• RReevviieeww bblloooodd hhiissttoollooggyy 
• RReevviieeww ccaarrddiiaacc mmuussccllee hhiissttoollooggyy 
• IIddeennttiiffyy llaayyeerrss ooff tthhee hheeaarrtt wwaallll 
• RReevviieeww tthhee llooccaattiioonn ooff tthhee hheeaarrtt wwiitthhiinn tthhee 
tthhoorraacciicc ccaavviittyy 
• IIddeennttiiffyy ssttrruuccttuurreess iinn ggrroossss aannaattoommyy ooff tthhee 
hheeaarrtt 
• IIddeennttiiffyy vveesssseellss iinnvvoollvveedd iinn ccoorroonnaarryy 
cciirrccuullaattiioonn 
2200--22
Figure 20–1 
OOrrggaanniizzaattiioonn 
ooff tthhee 
CCaarrddiioovvaassccuullaarr 
SSyysstteemm
CCaarrddiiaacc MMuussccllee HHiissttoollooggyy 
2200--44
BBlloooodd CCeellllss 
2200--55
HHeeaarrtt 
• LLooccaatteedd ddiirreeccttllyy bbeehhiinndd sstteerrnnuumm 
Figure 20–2a 
Between pleural cavities in the 
mediastinum
HEART 
Lungs 
have 
been 
removed.
PPeerriiccaarrddiiuumm 
2200--88
HHeeaarrtt WWaallll 
2200--99
SSppeecciiffiicc HHeeaarrtt AAnnaattoommyy 
Anterior View
EExxtteerrnnaall AAnnaattoommyy 
2200--1111
CCoorroonnaarryy CCiirrccuullaattiioonn 
Figure 18.7a
Figure 20–6a 
CCoorroonnaall sseeccttiioonn ooff tthhee 
hheeaarrtt
Walls of the ventricles: 
Left wall is thicker!
HHeeaarrtt VVaallvveess 
• AAttrriioovveennttrriiccuullaarr vvaallvveess 
• TTrriiccuussppiidd 
• BBiiccuussppiidd oorr mmiittrraall 
• SSeemmiilluunnaarr vvaallvveess 
• AAoorrttiicc 
• PPuullmmoonnaarryy 
• PPrreevveenntt bblloooodd ffrroomm 
fflloowwiinngg bbaacckk 
2200--1155
HHeeaarrtt VVaallvveess 
2200--1166

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Heart Anatomy and Blood Histology