Gaseous Exchange

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  • Created by: boidul
  • Created on: 13-05-13 00:09
Explain the Process of Gaseous Exchange
The respiratory system consists of a gas exchange surface across in which oxygen passes from the air into the blood stream and carbon dioxide passes from the blood stream and into the air through the alveoli. The surface area of gaseous exchange is
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formed of millions of tiny air sacs know as alveoli. The alveolars have a single cell wall and a rich supply of blood. The linings of the alveolis are kept moist because the gases need to be in solution to diffuse across the membrane, and are thin
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to allow efficient diffusion. Each alveolars are surrounded by the huge network of blood capillaries. When an individual breathes in, oxygen moves from the alveolis to the surrounding capillaries and into the blood stream. At the same time carbon
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dioxide moves from the blood stream to the surrounding capillaries and into the alveolis. Carbon dioxide is removed and released from the lungs and into the lungs when an individual exhales.
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formed of millions of tiny air sacs know as alveoli. The alveolars have a single cell wall and a rich supply of blood. The linings of the alveolis are kept moist because the gases need to be in solution to diffuse across the membrane, and are thin

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