Cardiology The Heart

heart
heart
maintains circulation by supplying oxygen-rich blood to all parts of the body

a hollow, muscular organ about the size of a fist, the heart is located in the chest cavity just behind the sternum, above the diaphragm and between the lungs

pericardium
pericardium
a fluid-filled sac surrounding the heart

attached to the sternum, diaphragm, and major blood vessels of the heart (the aorta and vena cavae)

epicardium
epicardium
outer layer of the heart wall that protects the heart

myocardium
myocardium
muscular middle layer of the heart wall made of cardiac muscle for heart contraction

Purkinje fibers
Purkinje fibers
used in heart contraction

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