Flows out through the aortic valve into the body via

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Flows out (through the Aortic Valve) into the body via the AORTA (artery). 15.3 Heart Actions 5 Describe the cardiac cycle and explain how heart sounds are produced.
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The heart chambers goes through periods of contraction (systole) and relaxation (diastole). When the Atria are in systole, the Ventricles are in diastole; vice versa. Heart sounds are due to the pressure changes within the chambers, thus causing the valves to ‘burst’ open and/or ‘slam’ shut. The first part of the heart sound (Lubb) occurs during Ventricular systole, when the AV valves close. The second heart sounds (Dupp) occurs during Ventricular diastole, when the Pulmonary and Aortic valves close. 6 Identify the parts of a normal ECG pattern and discuss the significance of this pattern. P Wave- left and right atria are full of blood and the SA Node fires. Q Wave- generated when the AV node releases the signal through the inter- ventricular septum. R Wave- left ventricle contracts . S Wave- basal part of the ventricles depolarize, causing the contraction of the right ventricle.
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