B5 - The Respiratory System

  • breathing takes in oxygen so that we can perform respiration
  • respiration releases carbon dioxide which leaves the body through exhalation
  • inspiration (breathing in) is when the intercostal muscles and diaphragm contract and make the thorax bigger, which expands the lungs and decreases the pressure
  • expiration (breathing out) is when the intercostals and the diaphragm relax, the thorax volume decreases, and the pressure is forced out of the…


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