Defines asthma and describes the stages of an asthma attack. Discusses who gets asthma and lists the common triggers of asthma as well as the signs and symptoms. Illustrates how the lung works, compares a normal bronchus to an asthmatic bronchus, and provides detail on an asthma attack and wheezing. Describes the types of asthma and illustrates extrinsic astma by showing the process of developing an allergy through multiple exposures to an allergen and illustrates intrinsic asthma by showing irritants being exposed to an irritated bronchial tube. A brief listing of management techniques is also shown.
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