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 if one part of the breathing system fails to carry out its function, then if that happen to a person then most likely he has a difficulty in breathing and Difficulty in transfering oxygen in the blood, then if that happens it may lead to death. When one part fails, then all parts will also fail in their function. all the part of breathing system needs to work as one, they should have teamwork to continue their work and their function 

i hope this will help !!
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