Cardiac Cycle | Class 10 Biology | Tuitionpedia

🎬 Title: Cardiac Cycle | Class 10 Biology | Tuitionpedia [0–5 sec | Hook] Did you know? Your heart beats continuously to pump blood throughout your body! But how does it work? Let's understand the cardiac cycle! [5–15 sec | Definition] The cardiac cycle is the sequence of events that occurs during one complete heartbeat. It includes contraction and relaxation of the heart chambers. [15–30 sec | Step 1: Atrial Systole] First, both atria contract and push blood into the ventricles. This is called atrial systole. [30–42 sec | Step 2: Ventricular Systole] Next, both ventricles contract. The right ventricle pumps blood to the lungs, while the left ventricle pumps blood to the whole body. This is called ventricular systole. [42–52 sec | Step 3: Complete Diastole] Finally, all four chambers relax. Blood enters the atria, and the ventricles begin filling again. This phase is called complete diastole. [52–60 sec | Recap + CTA] Remember: Atrial systole, ventricular systole, and complete diastole! This complete cycle takes about 0.8 seconds at a resting heart rate of 75 beats per minute. Follow Tuitionpedia for more easy science explanations!