'Releasing tiny microscopic particles' presentation slideshows

The bronchial system can be compared to a bush or a tree. The main tubes in your lungs that the air flows through are called bronchi. Branching off from the bronchi are smaller tubes called bronchioles. When these tubes become inflamed it causes airways to narrow, constrict and block off causing shortness of breath. There are two main types of bronchitis that frequently occur.

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