The trachea, also called the windpipe, is part of the passageway that supplies air to the lungs. Any prolonged blockage, even for a few minutes, can cause death. The trachea is about 4.5 inches long ...
MUCH has been said in the past about the relation of chronic irritation to the development of cancer. Recent concepts are more specific and put carcinogenesis on a physicochemical basis in which the ...
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