Gas Exchange GCSE Diffusion through cell membranes 2.0 / 5 based on 1 rating ? BiologyExchange of materialsGCSEAll boards Created by: Katherine HillCreated on: 01-05-11 09:29 What is Villi? Tiny little projections in the small intestine 1 of 2 Where does Gas Exchange happen? Lungs 2 of 2
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