Gas exchange- fish 0.0 / 5 ? BiologyCellular processes and structureA2/A-levelOCR Created by: CamillaCumminsCreated on: 15-02-17 09:51 What are the gills supported by? 5/6 gill arches 1 of 7 What are the gills protected by? Opercular flaps 2 of 7 Where does the gas exchange take place? In the lamellae 3 of 7 Why is the blood flow in the lamellae un-directional? Because of the arrangement or afferent blood vessels (these take blood to the lamellae) 4 of 7 What is the name of the blood vessels that take the blood away from the lamellae? Efferent blood vessels 5 of 7 How does the counter current between the blood and water help the exchange rate? It maintains a high concentration gradient 6 of 7 Why is the lamellae being thin beneficial? Creates a short diffusion gradient 7 of 7
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