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Continue to ChatWhy have we got smooth muscle around our bronchi (tubes in our lungs)? https://drsamheard.com/2020/09/16/why-have-we-got-smooth-muscle-around-our-bronchi-tubes-in-our-lungs/
Why have we got smooth muscle around our bronchi (tubes in our lungs)? https://drsamheard.com/2020/09/16/why-have-we-got-smooth-muscle-around-our-bronchi-tubes-in-our-lungs/