elistaysheyellS elistaysheyellS

01-03-2017
Biology

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Name the blood vessels that carry blood from the upper and lower parts of the body

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Аноним Аноним

08-03-2017

The atria and ventricles work together, contracting and relaxing to pump blood out of the heart in a coordinated and rhythmic fashion. As blood leaves each chamber of the heart, it passes through a valve.

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