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Heart
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Introduction to the heart
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4 2 HeartBroadflatbasepointsto
rightshoulderApexpoints
Heart Anatomy to left nip
Size of your fist
2 side by sidepumps
Location
1 Superiorsurface of diaphram
2 Leftof the midline from 2nd rib to 5th intercostal space
3 Anterior to the vertebralcolumn posterior to the sternum
4 Mediastinum
3 Layers of the heart order
Pericardium outer sac
Myocardium muscle bulk of mass
Endocardiumi inner
lining
Coverings of the heart Anatomy
Pericardium a doublewalled sac around the heartcomposed of
1 A superficial fibrous pericardium
2 A deep 2 layer serous pericardium
The parietal layer linesthe internal surface of the fibrous pericardium
The visceral layer or epicardium lines the surface of theheart
They are separated
by the fluid filled pericardial cavity
, Coverings of the heart physiology
The pericardiumi
1 Protects r anchors the heart
2 Prevents overfilling of the heart w blood
3 Allows for the heart towork in a relatively friction free environment
Epicardium i a visceral layer of the serous pericardium
Heart wall
Myocardiumi a cardiacmusclelayer forming the bulk of the heart
1 Branching musclecells arranged in bundles
2 Provides support for great vessels values
3 Directs spread ofaction potential across heart
4 fibrous skeleton of the heart i crisscrossing interlacing layer of connective tissue
insulation supports greatvessels
Endocardiumi endothelial layer of the inner myocardialsurface continous w vessels leaving 8
entering the heart
External HeartiMajorvessels of the heart anterior view
Vessels retoring blood to the heartinclude
superior inferior
1 Superior r inferior venue carea vesselleading intorightatrium bloodtoheartfromthebottom
2 Right t left pulmonary veins
Vessels conveying blood away from the hearti
1 Pulmonary trunk whichsplits into right 1 left pulmonary arteries
2 Ascendingaorta 3 branches brachiocephalic left common carotid subclavian arteries
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