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The process by which cells break down simple food molecules to release the energy they contain.
Folds of connective tissue that stretch across the opening of the larynx and produce a person's voice
A colorless, odorless, poisonous gas in cigarette smoke that passes through the lungs into the blood
the addictive drug found in tobacco that speeds the heartbeat, raises blood pressure, and causes dizziness and upset stomach
An irritation of the breathing passages in which the small passages become narrower than normal and may be clogged with mucus.
a major organ of the excretory system that eliminates urea, excess water, and other materials from the body.
Small filtering structure found in the kidneys that removes wastes from blood and produces urine
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