temporary narrowing of the bronchi, the airways

branching from the trachea to the lungs. Attacks

usually are brought on by allergic reaction to

ANTIGENS such as grass and tree pollens, mold

spores, fungi, animal dander, and certain foods but

may also be caused by chemical irritants in the

atmosphere or by infections of the respiratory

tract. Susceptibility to an asthma attack is based

on hyperactivity of the bronchial muscles, which

constrict on exposure to one or another of these

agents. Episodes of asthma vary widely in severity

Some common words found in the essay are:
, Breathing Easy, Resources Directory, Klingelhofer Asthma, asthma attacks, attacks usually, Asthma Handbook, frequent severe, asthma attack, breathing difficulty,
Approximate Word count = 416
Approximate Pages = 2 (250 words per page double spaced)