Why can t fish drown, and why can t fish drown in water?

Because oxygen may be dissolved in water, the gills of the fish can make the fish obtain oxygen dissolved in the water, and it can breathe in the air like us humans, but if you think that the fish can breathe more oxygen in the air, it is wrong, because the gills of the fish can only breathe oxygen in the water, and the gills of the fish quickly become dry and without water in the air, so the fish has no way to get oxygen and suffocates to death,,, and there is to see the fish in **, if it is put in boiling, In a tank with no air on the surface of the water and sealed, the fish will definitely die of suffocation after a while, because there is almost no oxygen in the boiled water, and there is no oxygen to dissolve into the water after sealing, and the fish will also die due to the lack of oxygen, and the fish will drown in the same way as people in the water.

Fish are actually drowned. Fish can live in the water not just because of the water, but because of the oxygen in the water. Fish use their gills to absorb oxygen from the water.

If too many fish live in a small tank or pool, the oxygen in the water will be quickly depleted, or if we do not change the water for the fish, the oxygen in the water will also be depleted quickly. In this way, the fish will suffocate to death. This is the same as when other animals drown

Because the fish breathes by the gills, it will not be drownedTerrestrial animals are drowned because they cannot use the oxygen in the water and die due to lack of oxygen in the body, and the fish breathe with gills and can directly absorb the oxygen dissolved in the water through the gill capillaries, which will not make the body lack oxygen, so it will not be drowned.

The main characteristics of the fish.

1.Presence of upper and lower jaws. This was an important turning point in the evolutionary history of vertebrates, with jaws increasing access to food, improving the ability to live and enhancing animal adaptability.

2.There are paired appendages - even fins. Greatly enhances mobility and becomes a condition for the appearance of limbs in terrestrial vertebrates.

3.Complete endoskeletal system. The spine completely replaces the notochord.

4.The brain is distinctly divided into five parts, with both nostrils and the appearance of semicircular canals.

5.Breathe with gills.

6.There is a good mechanism for regulating osmotic pressure in the body.

7。The blood circulation is single-circulation.

8.Regulate the buoyancy of the water with swim bladder and fat.

9.Swim by the swing of the tail or trunk, as well as the coordination of the fins.

<> fish breathe by gills, so they will not be drowned, land animals are drowned because they cannot use the oxygen in the water, causing the body to die due to lack of oxygen, fish breathe with gills, can directly absorb the oxygen dissolved in the water through the gills capillaries, will not make the body hypoxic, so it will not be drowned.

Categories: Leisure Hobbies >> Flowers, birds, fish and insects.

Problem description: When changing the water for the fish again, from one fish tank to another fish tank, when the fish is poured out, there will be a staggered flow of water, at this time, will the fish choke to death?

Analysis: The fish does drown, and that's when its respirator, the gill of the respirator, is seriously problematic, which is equivalent to the diver having his oxygen cylinder removed.

When changing the water for a fish, changing from one tank to another causes problems for the fish to be the temperature difference in the water. Fish is ectothermic animals, body temperature close to the water temperature, if the water temperature suddenly changes drastically, it will make the body of the fish metabolic disorders, serious can lead to sudden death, the principle is like a person living in Shanghai in 5 minutes suddenly sent to Mount Everest, can not adapt to the problem will have problems.

Most fish breathe with gills, and only when water passes through the gills can the gills extract oxygen from the water. The shark is not a bony fish and can only get more water into its mouth by constantly swimming, so as long as the shark is not allowed to swim, it will drown.

Drowning a fish is essentially making the fish unable to breathe oxygen. Therefore, there are four ways to make a fish unable to breathe oxygen: The first method:

Raise the temperature of the water; The second: sprinkle salt into the water; The third way: change the air pressure; Fourth:

Don't let the fish move.

The root cause of drowning is lack of oxygen, so insufficient oxygen in the water can drown the fish as well.

Everyone knows that fish live in water and are masters of swimming. Humans also imitate the swimming of fish and have made a lot of high-tech equipment. So if someone told you, "This fish is drowned," would you look at him like a fool?

Fish are born to live in water, how can they drown? In fact, the fish will really drown. Next, I will explain to you the scientific truth in detail.

Although fish cannot live without water, fish in the water need oxygen to sustain their lives just like other organisms, but they use their gills to breathe and their swim bladders to adjust their height. If the water they are in runs out of oxygen, the fish will also "braid" every minute. This is a problem that all fish face.

Why do good fish lack oxygen? There are several reasons for this.

First, there may be a problem with the swim bladder. Like humans, fish sinking has a depth limit, and it is not possible to survive at any depth. When the fish sink to a depth that their bodies cannot bear, the strong water pressure will cause the swim bladder to lose its balance, and the instability of buoyancy will make the fish sink deeper and deeper.

There will be less oxygen in deep water, and if the water pressure is too high, the fish will have no choice but to die.

2. A large number of aquatic plants suddenly appear in a normal body of water, and these large numbers of aquatic plants will deplete the oxygen in the water, so that the fish here have no oxygen to breathe at all, and eventually die due to lack of oxygen.

3. It may be that the fish is sick (such as gill rot), so that the fish cannot take in oxygen normally from the water. So that even if there is more oxygen in the water, it will be useless for these sick fish, and they will all eventually suffocate to death.

Fourth, for those fish who are accustomed to living in the deep sea, in order to adapt to the high pressure in the deep sea, the pressure in their bodies is also very great. If they are moved to shallow water for a short period of time, even if they do not leave the water, they may cause relatively high pressure in the body due to the rapid release of external pressure. At this point, they inflate like balloons so quickly that their internal organs may burst and eventually explode to death.

If your fish floats to the surface and opens their mouths to breathe when they are fine, it may be because there is too little oxygen in the water.

The fish will drown. Although fish do not breathe by lungs but by gills, it is also possible for fish to die of lack of oxygen in the water, that is, to be drowned. Although the water molecule is composed of 2 hydrogen atoms and 1 oxygen atom, the oxygen that the fish breathe in the water comes from the oxygen dissolved in the water, not from the water, so if the oxygen content in the water is insufficient, it will be "drowned".

The respiratory organs of humans are the lungs, and the respiratory organs of fish are the gills. The fish has two gills on both sides of the body, and there are dense microvessels in the gill plates, and when the water flows through the gills, the fish will discharge carbon dioxide from the body into the water and absorb the dissolved oxygen in the water, at which point the gas exchange is completed. This is how the fish's breathing in the water works.

Oxygen is a gas, colorless, odorless, and tasteless, and oxygen molecules are able to dissolve in water. However, oxygen has a very low solubility in water and is a gas that is not easily soluble in water.