Class 7 Biology Respiration in Organisms Sneezing


  • Sneezing refers to the reflex action occurring due to common cold, flu, or due to inhalation of foreign particles causing irritation inside the nose.
  • The air which we breathe in consists of many foreign particles including smoke and dust, pollens, etc.
  • While breathing in, many foreign particles enter the nostrils and gets trapped in the hair present in the nasal cavity.

  • While some particles gets trapped in the hair some may even pass through them and cause irritate in the inner lining of the nasal cavity.
  • This irritation results in sneeze which expels out the dirty foreign particles that entered the cavity.

  • Thus only clean and pure air enters the body

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