Question | Answer |
special region of the right atrium where the cells receive the signal from the nervous system to contract | SA node |
inner most layer of an artery or vein | tunica intima |
amount of blood pumped out of the ventricles with each beat | stroke volume |
vessels that receive blood from the capillaries to begin its journey back to the heart | venules |
irregular heart sounds caused by turbulent blood flow through the heart | murmur |
rapid uncoordinated beating of the heart | fibrillation |
group of cells between the right atrium and ventricle that holds onto the signal for the heart cells to contract | AV Node |
how fast the heart beats | heart rate |
outermost layer of a blood vessel | tunica externa |
nerve cells encountered after the signal to contract has reached the apex of the heart then turns the corner | purkinje fibers |
Death of cardiac cells due to insufficient oxygen delivery | myocardial infarction |
heart muscle relaxation | diastole |
series of events in a complete heart beat | cardiac cycle |
small vessels that feed capillary beds | arterioles |
middle layer of a blood vessel | tunica media |
another name for the AV node | pacemaker |
structure the signal for the heart to contract passes into after leaving the AV node | AV bundle |
clogging an heart artery with cholesterol or a blood clot | artherosclerosis |