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Question
Fish breathe with the help of gills which are richly supplied with blood vessels. The gills help the fish to
Options
take in oxygen from the air.
take in oxygen dissolved in water.
absorb nutrients present in water.
release waste substances in water.
Solution
take in oxygen dissolved in water.
Explanation:
Fish use gills for the exchange of gases. Gills are made up of a large number of filaments, richly supplied with thin blood vessels called capillaries. As water enters through the mouth it flows over the gills. The blood in the capillaries absorbs oxygen dissolved in water and gives out carbon dioxide into the water.
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