Breathing and Exchange of Gases — BIOLOGY STD 11 Science — Question
Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYBreathing and Exchange of Gases1 Mark
Question
Cigarette smoking causes emphysema. Give reason.
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Answer
Cigarette smoke contains various harmful chemicals like tar, nicotine, hydrogen cyanide and different metals. They damage alveolar walls due to which respiratory surface in decreased and it causes emphysema. Cigarette smoking is one of the major causes of emphysema. It is a chronic disorder.
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