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  • Smart Learning for All

  • What is asthma?

  • It is a nickname for cinema.

  • Stop bluffing.

  • Asthma is a lung disease.

  • A person with asthma has red and swollen bronchial tubes with a lot of mucus.

  • As a result, the bronchial tubes get narrower than normal, thus making it hard to breathe.

  • Besides this, the bronchial tubes are highly sensitive to irritants like pollen, tobacco smoke, dust, etc.

  • When an asthmatic person inhales an irritant.

  • The tubes become much more swollen and more mucus is produced.

  • This causes further narrowing of the tubes.

  • This narrowing makes exhalation harder than inhalation.

  • Hence, carbon dioxide rich air gets trapped in the person's body.

  • He does not get sufficient supply of fresh oxygen.

  • As a result, the person can have severe shortness of breath and a feeling of tightness in the chest.

  • When an asthmatic person experiences such problems, he is said to have an asthma attack.

  • For more educational videos, please download 'Smart Learning For All' Android App from Google Play Store.

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B2 中高級 美國腔

什麼是哮喘?| 哮喘是什麼? (What is asthma? | #aumsum)

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    AumSum 發佈於 2021 年 01 月 14 日