Explain in brief about breathing in fish.
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Answer:
Fishes uses gills for the exchange of gases. Gills are projections of the skin. Gills are made up of a large number of filaments, they are richly supplied with the thin blood vessels, called capillaries. As water enters through the mouth, it flows over the gills. The blood in the capillaries absorb oxygen and gives out carbon dioxide through its walls. So, Gills are well supplied with blood vessels for exchange of gases.
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Answer:
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Explanation:
A fish breathes by taking water into its mouth and forcing it out through the gill passages. As water passes over the thin walls of the gills, dissolved oxygen moves into the blood and travels to the fish's cells. Because dolphins and whales aren't fish at all! They are mammals, just like humans.