Physiology of Respiration

The respiratory tract is the path of air from the nose to the lungs. It is separated into two portions: Upper Respiratory Tract and the Inferior Respiratory Tract. Contained in the upper respiratory tract are the Nostrils, Nasal Cavities, Pharynx, Epiglottis, and the Larynx. The inferior respiratory tract contains of the Trachea, Bronchi, Bronchioles, and the Lungs. The important function of respiratory system is gas exchange and hence in breathing. Infants have a breathing rate of about 40 times per minute and adults have 12 to 16 breaths per minute. Pulmonologists treat the respiratory system that affects from various respiratory disorders.


  • Track 1-1 Respiratory Activity
  • Track 2-2 Inspiration & Expiration
  • Track 3-3 Gas Exchange
  • Track 4-4 Respiratory Diseases

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