AV node intercalated disks purkinjė fibers time delay bundle of HiS The wave of excitation that begins in SA node cardiocytes distributes throughout the regular atrial cardiocytes through gap junctions in the . This wave of excitation eventually reaches the ,which transmits the wave of excitation down the to the Conduction of this excitation signal occurs with a that permits for the ventricles to fully fill with blood before ventricular depolarization and contraction.

Blood flow through capillaries in the walls of the left ventricle is ______.   A unnecessary because the myocardiocytes in the wall of the left ventricle get plenty of O2 from the blood they pump   B greatest during diastole; these capillaries are squeezed shut during systole when the surrounding muscle cells contract   C greatest during systole; blood stops following through capillaries during diastole because the heart is relaxed

if the ventricle cannot pump out as much blood to lung as is coming in through the vena cava what will happen to venous return to the heart increase/decrease

Briefly present the most significant difference between atrial and ventricular arrhythmias