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highly addictive substance found in tobacco that accelerates the heart rate, and contracts and hardens the arteries.
the cartilaginous flap at the top of the mammalian trachea, which closes off the entrance to the...
when a plant cell loses water and the cell membrane pulls away from cell wall.
water that falls to earth in any form, such as rain, snow, hail and sleet.
the liquid produced by the kidneys consisting mainly of water and nitrogenous wastes such as...
a person who does not eat animal flesh, but does usually include milk and eggs in their diet....