Cycle & Disorders
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,Body Fluids and Circulation
•Cardiac Cycle
• Phases of cardiac cycle
• Double Circulation (Pulmonary & Systemic)
• Disorders of the Circulatory System
EVERMORE DELUXE
, Cardiac Cycle
Cyclic contraction and relaxation of heart for pumping blood
Joint Diastole Atrial Syst
• SAN generates an
• Relaxed state of all heart chambers potential.
• When tricuspid and bicuspid valves open, blood from • Both atria contra
pulmonary vein and vena cava flows into left and right • Increases flow of
ventricles respectively through left and right atria the ventricles by
Phases of cardiac cycle • Semilunar valves are closed at this stage