Asthma: The Causes and Symptoms
Asthma is a disorder of the respiratory system in which the passages of the lung
periodically narrow, causing coughing, wheezing, and shortness of breath. When Henry was
little he was diagnosed with asthma. Now carries an inhaler with him to help keep him from
having asthma attacks. Many people experience asthma symptoms everyday. Asthma can be
controlled by avoiding triggers such as dust or smoke.
There are three symptoms of asthma. The first symptom is airway obstruction. In people with asthma, allergy-causing substances and environmental triggers make bands of muscle surrounding the airways tighten, and air cannot move freely. For example, Dan was jogging through a park with many blossoming flowers. He started sneezing and became short of breath due to the pollen floating around in the air. The second symptom is inflammation. People with asthma have red swollen bronchial tubes, which are airways of the lungs. This......
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