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  • 23-01-2017
  • Biology
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help plz and thx hope you will tell me ..... (please)

help plz and thx hope you will tell me please class=

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Vimal1
Vimal1 Vimal1
  • 23-01-2017
Alveoli are thin walled, there are many which increases the surface area.
Gas exchange takes place in the alveoli. Having a thin wall makes it easy and large amount of gasses can diffuse across due to the large surface area.
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