How is gas exchange donein mammals?

Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN:9781305389892
Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Chapter46: Gas Exchange: The Respiratory System
Section46.3: The Mammalian Respiratory System
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How is gas exchange done
in mammals?

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Step 1

Most mammals live on land, and hence obtain oxygen by breathing air.

Gas exchange is the physical process by which gases move passively by diffusion across a surface. The process of gas exchange is important as it provides oxygen to the cells of living organisms which is utilized to obtain energy from organic molecules. 

There are three overall processes involved in gas exchange are:

  • Moving air in and out of the lungs (ventilation)
  • Oxygen-carbon dioxide exchange (diffusion)
  • Pumping blood through the lungs (perfusion)
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