What kind of animals have lungs?

Respiratory System - All About Breathing. Your respiratory system is all about exchanging gases with the environment. Some animals such as amphibians are able to exchange gases through their moist skin. Fish have gills while mammals, birds, and reptiles have lungs.

People also ask, what fish breathe through lungs?

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.

Do mammals have lungs or gills?

Whales cannot breathe underwater because they are mammals and not fish. This means that their breathing organs are lungs, rather than gills. So, like humans, whales need to come to the surface to take a deep breath of fresh air and when they are underwater they hold their breath. Fish also need oxygen to breathe.

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