BRONCHOCONSTRICTION constriction of the pulmonary bronchi. The bronchi are two tubes into which the trachea divides, which divide into many bronchi upon reaching the lungs. Compressing reduces their ability to transport air to and from the lungs. The most common condition is bronchitis, an inflammation that also produces phlegm. When the thing gets and chronic is when we get to have COPD, or chronic obstructive pulmonary disease, the third cause of death in the United States, in which the reduction in flow is permanent and destroys the capacity of the rest of the organs, including the brain.
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