How to write an asthma essay?

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Many students are worried about how to write an asthma essay. Asthma creates difficulties in breathing for millions of people across the world. Symptoms include coughing, wheezing, and chest stiffness. Asthma may be acute or chronic. For one to glean what causes asthma and its symptoms, it helps to know how the airways function. These tubes carry air into and out of the lungs. For asthma patients, the airways inflame. This makes air tube swollen and extremely sensitive. Because of this, they tend to react to substances the person inhales. The reaction of airways makes the muscles around them to tighten. This narrows the trachea allowing little air to pass into the lungs.
 
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