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Keyword Explanation

Alveolus an air cell of the lungs, formed by the terminal dilation of tiny air passageways.

Expiration the act of expiring, or breathing out; emission of air from the lungs.

Inspiration the drawing of air into the lungs; inhalation.

Active the movement of ions or molecules across a…

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Medium the body's oxygen deficiency resulting from strenuous physical activity.

Oxygen debt the production of living organisms from other living organisms

Biogenesis the now discredited theory that living organisms can arise spontaneously from inanimate matter

generation a medicine that kills some dangerous micro-orangism .It is made from a…


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