SA and AV node
septum
Divides the right and left chambers of the heart
stage 1 of heart contraction
SA node sends electrical impulses
Stage 4 of heart contraction
heart contracts
AV (atrioventricular) node
located in the right atrium along the lower part of the interatrial septum, relays signals to the ventricles, heart contractions
SA (sinoatrial) node (pacemaker)
located in the wall of the right atrium near the opening of the superior vena cava, generate electrical impulses in atria, and set rate of heart contractions
apex of the heart
lower tip of the heart
Electrocardiogram (ECG)
A recording of the electrical activity of the heart, provides heart health, patience with an abnormal heartbeat are implanted an artificial pacemakerr
stage 2 of heart contraction
signals pass to AV node
stage 3 of heart contraction
AV node consist of specialize muscle fibers that reach down to the apex