Depolarization of atria just before they contract
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Terms in this set (12)
During ventricular systole, blood pressure _____ in _____. Atrioventricular valves _____ : causes first heart sound "lub". Semilunar valves _____ as blood pushes against them. Blood travels out of the _____ through _____ _____ and _____. Atria are _____ , chambers start filling with blood.builds, close, open, ventricles, pulmonary artery, aorta, relaxedDuring early diastole, second heart sound is heard as semilunar valves _____, causing "dup"sound. Atria finish _____as pressure in the heart _____. Ventricular pressure is _____ and atrioventricular valves _____.close, refilling, drops, low, open