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Gills are to let the fish 'breathe' underwater, I don't think they help them swim though...
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∙ 14y ago
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Do fish have to swim to breath?
No only sharks have to keep moving to force water through their gills.
What is fish's primary use for fins?
They are used to propel the fish through the water, and in some cases they are used to keep water moving through the gills!
What is the respiratory organ of fish?
Human beings breathe using our lungs. Oxygen goes into our blood and carbon dioxide goes out of our blood and into our lungs. When we breathe out we get rid of it. These gasses dissolve in our blood. In water there is dissolved oxygen. Fish don't have lungs; they have specially developed organs called gills. As water flows over the gills oxygen is absorbed and carbon dioxide can come out of the fish's blood through the delicate membrane of the gills. Some fish are able to pump water over their gills, which means that they can lie on the bottom or stay still in the water. Other fish need to keep moving to pass fresh water over their gills.
What is the organ of fish?
Human beings breathe using our lungs. Oxygen goes into our blood and carbon dioxide goes out of our blood and into our lungs. When we breathe out we get rid of it. These gasses dissolve in our blood. In water there is dissolved oxygen. Fish don't have lungs; they have specially developed organs called gills. As water flows over the gills oxygen is absorbed and carbon dioxide can come out of the fish's blood through the delicate membrane of the gills. Some fish are able to pump water over their gills, which means that they can lie on the bottom or stay still in the water. Other fish need to keep moving to pass fresh water over their gills.
Why do sharks die unless they are constently swimming?
Their gills are rather primitive compared to those of fish that do not have to keep pumping water into their gills by constantly swimming.
Tuna fish must keep moving to stay alive?
yes, tuna need to force oxygenated water through their gills unlike other fish who suck water in on their own. Also Tuna don't have an air bladder so they would sink if they stopped swimming
What is the only animal that never sleeps?
Some people think that sharks never sleep because they need to keep moving in order to breathe. However, some sharks need to keep moving to do this, while others don't. Some sharks have spiracles, a small opening behind their eyes, that force water across the shark's gills so the shark can rest. Other sharks do need to swim constantly to keep water moving over their gills and their bodies, but sharks can swim without using all of their brains. These sharks have active periods, and restful periods, rather than undergoing deep sleep like we do. They seem to be sleep-swimming, with parts of their brain resting.
Why are cartilaginous fish such as sharks constantly moving?
If sharks did not move then they would die, when they move its like they are breathing, I know we dont do it but they are sharks ya know xD
How is the oxygen taken in by the lungs of a mammal different from the oxygen taken in by the gills of a fish?
the gills of a fish take in oxygen in water while the human lung take in oxygen in the air. I think...
How do sharks breathe underwater?
Using gills because sharks are fishes and if look closely on animal planet-sharks you will see that there are like cuts on the left or right of their head,well that is gills and sharks uses it to breathe it takes in oxygen and gives out carbon dioxide----------------------------------------------------------------------Sharks "breathe" by using their gills. Water passes through the mouth and out the gill slits. Oxygen is exchanged through the tissues lining the gills.Unlike other fish SOME SPECIES of shark cannot pump water through their gills by opening and closing their mouths, they have to keep moving to make the water flow. In this way they are like ram jets. For a shark it is "Swim or die!"However, OTHER SPECIES of sharks can pump water over their gills when at rest and do not need to keep swimming. These species can be seen sleeping on the seabed around tropical reefs.Gills.sharks breath through there gills. if you look up a picture of a shark with its mouth open yiou can see the gills at the side of the sharks mouth.hope i helped youIt's a fish.. it has Gills.
Do sharks need to move constantly?
No. This is a common miscomception. Fish need to move to filter water through they're lungs to get Oxygen. But Sharks gills contract and expand to draw water in and can remain motionless, and healthy like Nurse Sharks.
Why do fish have scales but squirrels have fur?
Fish have scales because their natural habitat is of course, water. If a fish had fur, it would weigh them down. Also, where would a fish's gills go because gills enable fish to breathe! Squirrels have fur also for their habitat to keep them warm. Hope I have helped!!!!
