module 3
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epicardium
the smooth mind/ membrain
endocardium
the smooth line/ membrane in the chambers of the heart and the surface of the values
myocardium
muscular tissue of the heart
pericardium
the membrane sac surrounding the heart
septum
separates the right and left of the heart
interatical septum
the upper part of this partition
interventicular septum
lower partition
right atrium
receives oxygenated venous blood
right ventricle
pump unoxygenated venous to the lungs
left atrum
receives blood high in oxygen contest as it returns from the lungs
left ventricle
has the thickest wall, pumps oxygenated blood to all parts of the body
values
blood flow between the chambers is regulated by a system of one-way valves
tricuspid valve
closes when the right ventricle pumps to prevent backflow into the right atrium
pulmonary semilunar valve
located between the right ventricle and pulmonary artery.When the right ventricle has emptied, this valve closes to prevent back flow into the right ventricle.
mitral valve
Prevents blood from returning to the (Bicuspid Valve) left atrium bi= 2
aortic semiluar valve
Located between the left ventricle and the aorta. Prevents return of aortic blood into left ventricle.
pulmonary circuit
transports blood form the right ventricle to the lungs to get oxygen and then returns blood to the left atrium.
systemic circuit
transports blood from the heart to the rest of the body (excluding the lungs)
systole
active contraction(force pumping) phase
diastole
resting period
electric impulse
is needed to initiate rhythmical heart contractions
sinoatrial node (sa node) pacemaker of the heart
atrioventricular Node (AV Node)
bundle of his