Biology, 09.10.2019 02:50 Guidomigoo3x

The aortic valve, which is located between the left ventricle and the aorta, functions to (1 point)
push blood forward toward the lungs.
add oxygen to blood.
filter the blood.
prevent blood from flowing backward.

23. the structures that contain membranes across which oxygen and carbon dioxide diffuse are the (1 point)
bronchi.
bronchioles.
vocal cords.
alveoli.

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