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The lungs' two grand entrances, where one windpipe splits to feed both halls.
means The two main airways branching from the trachea, each carrying air into one lung.
from From Greek bronchos, the windpipe — the Greeks named the pipe before knowing it forked.
Uneven twinsRight bronchus wider, shorter, straighter than the left.
Inhaled hazardStray objects usually land in the right one.
Endless branchingThey divide into bronchioles, then tiny air sacs.