biology·NCERT Class 11·Body Fluids & Circulation
Human Heart & Cardiac Cycle
Medium+90 XP❤️
Your heart beats ~72 times a minute, pumping blood to 37 trillion cells. But why does the right side pump to the lungs and the left to the body? Tap the chambers to find out.
›Double circulation: pulmonary (right heart → lungs → left heart) + systemic (left heart → body → right heart).
›Cardiac cycle: Atrial systole → Ventricular systole → Diastole. Duration ~0.8 s.