Gas exchange surfaces - fish 0.0 / 5 ? BiologyHuman, animal and plant physiologyASAQA Created by: rpanesCreated on: 07-03-17 15:10 The gills of a fish are protected by the Opperculum 1 of 7 The water flows _______ the flow of the blood, this is called a ______________ system against, countercurrent 2 of 7 This system ( question 2) maintains a .... high concentration gradient across the gill 3 of 7 The surface area to volume ratio of the gills are increased by _________which have small folds called _______ on them gill filaments, lamellae 4 of 7 As the temperature of the water rises, the oxygen levels in the water _________ decrease 5 of 7 the lamellae are thin walled and in close contact with the water giving a ___________ short diffusion pathway 6 of 7 The gills have a _______ blood supply, maintaining a ____ concentration gradient high, high 7 of 7
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