Biology - College Biology - Physiology - Cardiovascular physiology - Cardiac Cycle and Blood Pressure
5 steps. Step 1: 'CARDIAC CYCLE - One complete heartbeat. Atrial systole (atria contract, push blood to ventricles) → Ventricular systole (ventricles contract, push blood to arteries) → Diastole (everything relaxes, heart fills). One cycle ≈ 0.8 seconds at rest.' Step 2: 'ELECTRICAL CONDUCTION - SAN