HIU is a predatory animal in the ocean that is ready to prey on anything when it is looking for food or disturbed. However, there is one very interesting fact about sharks, that is, sharks have to keep moving.
According to Saveoursea, to survive, sharks must keep oxygen-rich water flowing over their gills. Oxygen in the water that goes through their gills will be absorbed into their blood.
Blood is then pumped throughout their body to supply oxygen to all parts of the body. Sharks are so much better than humans at absorbing oxygen, they can absorb 80 percent oxygen when there is only 1 percent oxygen in the water around them.
Meanwhile, humans are only able to absorb 25 percent of the 21 percent of oxygen that is around them through the air they breathe. Some sharks can keep the oxygen-rich water flowing over their gills while lying still on the ocean floor or even buried in the sand.
However, there are types of sharks that must continue to swim in order to stay alive by getting oxygen-rich water. It would flow in through its mouth and be continuously absorbed by its gills in a type of breathing known as ram ventilation.
Sharks that use only ram vents for breathing are the great white shark, bull shark, and shortfin mako shark. Researchers initially thought these sharks had to be constantly on the move to stay alive because they exhibit no discernible periods of inactivity and that keeps the species from appearing to be resting or sleeping.
Some shark scientists think because the open ocean is so empty, the shark’s brain isn’t taxed enough to sleep. However, this idea was rejected as it was impossible in the open ocean for sharks to use complex visual, navigation, predation and communication skills.
This is because sharks with ram ventilation will drown if they stop swimming. Constantly absorbing oxygen-rich water to their gills allows them to keep swimming while resting or “sleeping”.
Several great white sharks were fitted with tracking devices and proven hours in the same spot. Shark scientists think they are resting, facing a flowing current with their mouths open and letting the water flow over their gills.
So, some types of sharks have to keep swimming or at least stay in a flowing current to keep getting oxygen. If you don’t get a supply of oxygen, then like other living things, sharks will die.
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2023-08-09 19:01:46
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