list three characterstics of lungs which make it an efficient respiratory surface
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1. (i) It has large surface area and branched. (ii) Contain an extensive network of blood vessels. (iii) It is thin, delicate and fine.
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Three characteristics of lungs which make it efficient respiratory surface is :
1. It has a ventilation mechanism .
2.It has large surface area and branched.
3.Rich bood supply each alveoulous is sounded by capilaries.
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