2018 Paper 1 Video Solutions - A/L Biology: Introduction Topics
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Solutions To GCE A/L 2018
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A good respiratory surface should be moist inorder for respiratory gases to dissolve in it
It should be highly vascularised so that the respiratory gases should be distributed all round the body
It should have a thin membrane to reduce the diffusion distance . This is because rate of diffusion is invesely propôrtional to distance
a)State the characteristics of a respiratory surface