Question

꧁Hi Brainlies!!꧂
❥︎Q. How can aquatic animals breathe under water?
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Answer 1

How do aquatic animals breathe under water?

Fish and sea animals usually have Gills that enable them to breathe underwater. The gills are organs that remove oxygen from the water. A fish breathes by taking water into it's mouth and letting it out through it's gills. Some exceptions are dolphins and whales because they are mammals and they must come to the ocean's surface to breathe.

The lungs of mammals would not work very well for a fish, because one breath underwater would fill them with fluid and make them useless. Nonetheless, fish need oxygen to breathe, too. In order to remove oxygen from the water, they rely on special organs called "gills."

Gills are feathery organs full of blood vessels. 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.

If fish can breathe underwater, then why do some fish, like dolphins and whales, swim to the surface of the ocean? Because dolphins and whales aren't fish at all! They are mammals, just like humans.

Dolphins and whales are similar to humans in many ways: They give birth to live babies instead of laying eggs, are warm-blooded and have lungs for breathing air. When a whale or dolphin surfaces, it breathes air through its nose (commonly called a "blowhole") on the top of its head.

Explanation:

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Answer 2

Answer:

꧁ANSWER!!꧂

Aquatic animals may breathe air or extract oxygen that dissolved in water through specialised organs called gills, or directly through the skin.

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