NEET (NTA)-National Eligibility cum Entrance Test (Medical) Biology Human Physiology-Breathing and Respiration Revision (Page 12 of 12)

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Must to Remember Facts

  • In direct respiration exchange of gases is through body cells directly and blood is not used. It is found in aerobic bacteria, protists, plants, sponges, flatworms, round worms, coelenterates and many arthropods.

  • In indirect respiration exchange of gases takes place through special respiratory organs like skin, gills, buccopharyngeal cavity and lungs.

  • Normal rate of respiration is 12 to 15 times/min.

  • Eupnea is normal regular breathing

  • Hyperpnea is an increase in rate

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