Biology, 08.01.2020 00:31, Jennitiu

The "lub" heart sound is due to the select one: a. onward rush of blood to the heart. b. contraction of aortic muscle tissue. c. closing of the semilunar valves. d. closing of the atrioventricular valves. e. the recoil of the aorta following the ventricle contraction.

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The "lub" heart sound is due to the select one: a. onward rush of blood to the heart. b. contractio...