The effects of tobacco smoke on the respiratory system include: irritation of the trachea (windpipe) and larynx (voice box) reduced lung function and breathlessness due to swelling and narrowing of the lung airways and excess mucus in the lung passages.
.Imagine standing next to exhaust of an old truck that is giving off noxious fumes and breathing in the smoke for 5 minutes. Contemplate the effect this smoke will have on your nasal passage, the throat and your lungs. Most people would dread such an experiment with health in real life. The same people would give no thought to lighting up a cigarette and subjecting their lungs to hot smoke, produced by the combustion of tobacco and other chemicals, and tar.