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• n  either of the two main branches of the trachea

• A cough she developed in 2004 was later diagnosed as tuberculosis, and by March of this year, her condition worsened to the point where one bronchus the extension of the .
• The cancer was not, as he had expected, confined to one lobe of the left lung but had its origin in the bronchus (one of the two major branches of the windpipe) supplying air to .
• Air enters each lung through a bronchus, which branches from the windpipe (trachea).

• bronchial tube

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  Brown coloring of human bronchus cells indicates infection, while blue cells are not infected. The study found that H7N9 causes extensive infection of surface (epithelial) cells, similar to 2009 H1N1, while H5N1 infects only some epithelial cells.
  July 25, 2013 - Center for Infectious Disease Research and Policy