The cardiac cycle of the mammalian heart includes phases of systole and diastole of the chambers. During atrial and ventricular diastole, all four chambers are relaxed (the beginning of the cardiac cycle). What occurs next? atrial and ventricular systole: all chambers contract, forcing blood out of the heart to all circuits systole of the right ventricle and right atrium: blood is forced into the pulmonary artery only systole of the left ventricle and left atrium: blood is forced into the systemic circuit only atrial systole and ventricular diastole: the 2 atria contract and blood flows into the 2 ventricles
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Beginning with all chambers of the heart in the "relaxed" phase, describe the cardiac cycle in mammals, with systole and diastole of the atria and ventricles. For each time point in the cycle you select, state the following: Whether the atria and ventricles are contracting or relaxing Whether the AV valves and semilunar valves are closed or open Whether the pressure in the atria and ventricles is high or low. (Please make the answer not to long, and to the point)
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The cardiac cycle consists of Systole and diastole of atria Systole and diastole of ventricles Systole and diastole of both atria and ventricles Systole of ventricles only
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