- Deoxygenated Blood Enters The Heart Through Two Large Veins The Inferior And Superior Vena Cava These Veins Empty Their 1 (27.73 KiB) Viewed 99 times
- Deoxygenated Blood Enters The Heart Through Two Large Veins The Inferior And Superior Vena Cava These Veins Empty Their 2 (40.31 KiB) Viewed 99 times
Normal cardiac rhythm is established by the sinoatrial (SA) node, a specialized clump of conducting cells located in the superior right atrium. The electrical impulse then spreads throughout the atria and arrives at the atrioventricular (AV) node. This clump of specialized conductive cells delays the signal to allow the left and right atria time to finish their contractions and pump blood into the ventricles. From here, the signal is carried into the interventricular septum by the atrioventricular bundle. This structure proceeds to divide into the which travel down the interventricular septum. At the apex of the heart, Purkinje fibers spread the impulse to the myocardial contractile cells in the ventricles. O left and right main bronchi O superior and inferior cardiac nerves O left and right bundle branches inferior and superior vena cava O left and right coronary arteries