Biology, 14.07.2019 11:00 biba54

Select the correct answer from each drop-down menu. the heart is a muscular organ that pumps blood. blood that contains waste materials is brought to the heart by blood vessels. this blood enters the (left atrium, right atrium, right ventricle) and then moves down. the presence of the (atrioventricular valve, valves in the aorta, valves in the veins) prevents the backflow of blood inside the heart

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Select the correct answer from each drop-down menu. the heart is a muscular organ that pumps blood....