write short notes on :a]Alveoli b]trachea c]larynx d]silicosis e]asbestosis

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https://www.meritnation.com/ask-answer/question/what-is-alveoli-what-are-its-functions/life-processes/1589157
https://www.meritnation.com/ask-answer/question/q-explain-about-silicosis-and-asbestosis/breathing-and-exchange-of-gases/9704845

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