Specialised exchange surfaces 0.0 / 5 ? BiologyHuman, animal and plant behaviourASOCR Created by: JemmaVenessCreated on: 20-05-16 13:03 Why do multicellular organisms need exchange surfaces? Because all ceels need substances like oxygen and glucose 1 of 5 What special features to exchange surfaces have to improve their efficiency Large surface area, thin, god blood supply and ventilation 2 of 5 Example of an exchange surface with a large surface area Root hair cells, increases the rate of absorption of water 3 of 5 Example of an exchange surface which is thin Alveoli, single layer of thin flat cells, decreases the distance that the diffusion has to take place on 4 of 5 Example of an exchange surface with a good blood supply and ventilation Alveoli, large capillary network and lungs are ventilated/ Fish gills, capilaries, fresh water constantly means good ventilation 5 of 5
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