Question

Describe how blood is pumped through the heart from the entry of deoxygenated blood through the venae cavae to the exit of deoxygenated blood out of the aortae, taking into account the roles of the heart valves and cardiac conductance in the flow of blood.

Answer 1

Our heart

Blood enter the right atrium through the inferior and superior venacava that is the deoxygenated blood. They are then moved into the right ventricle by the pressure over the atrium causing the opening of the Tricuspid valve. The blood now reach the left ventricle and move to the pulmonary artery through the pulmonary valve to reach the lungs by Pressure over ventricle in systole. The deoxygenated blood move into lungs and become oxygenated and the move back to the left side of heart. It reach the left atrium through the pulmonary vein and move into the left ventricle through the tricuspid valve. This blood in the left ventricle at the time of systole move into aorta through the aortic valve and reach the organs.

SA node produce impulse which move to the AV node and then Purkinje fibers and the wall of ventricle is the cause of heart beat