Breathing and Gas Exchange

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  • Created by: prodbytee
  • Created on: 26-05-20 12:49
Where is gaseous exchange carried out ?
In the lungs.
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How is air breathed in and out ?
Pressure changes in the thorax created by the movement of the rib and the diaphragm.
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What does the exchange surface consist of ?
Millions of tiny air sacs called alveoli
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Name some adaptations of the alveoli.
Ventilation moves air in and out and helps maintain a steep diffusion gradient. Very thin alveolus walls give a short diffusion distance. Spherical alveoli give a large SA for diffusion. Good blood capillary supply maintains concentration gradien
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What is in the thorax
sigh
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Other cards in this set

Card 2

Front

How is air breathed in and out ?

Back

Pressure changes in the thorax created by the movement of the rib and the diaphragm.

Card 3

Front

What does the exchange surface consist of ?

Back

Preview of the front of card 3

Card 4

Front

Name some adaptations of the alveoli.

Back

Preview of the front of card 4

Card 5

Front

What is in the thorax

Back

Preview of the front of card 5

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