How do fish breathe in the water, do they have nostrils?

We all know that fish can breathe freely in the water, not because they have nostrilsIt's because they have a body part that we humans and other animals don't have, and that's the gills that allow fish to breathe freely in the waterOn the other hand, there are fish that can breathe in the water and they can breathe on land, and that is the African lungfish, so the fish can breathe in the water precisely because they have gills. <>

It is precisely because of their gills that fish allow them to breathe freely and survive in the waterTheir body structure is different from that of humans and other animals, they can breathe freely in the water, not only because they have gills, but also because some of their internal organs, such as fish bubbles, can support them to breathe freely in the waterThe gills are the most important, the fish sucks the water through the mouth to obtain the water, and then discharges the water through the gills, so as to inhale the nutrients and nutrients in the water into the body, and the water is effectively eliminated. That's why they can breathe in the water, whether it's clear or muddyThey are both able to breathe effectively, and the gills not only filter but also effectively ensure the free movement of fish in the water. <>

Humans can't breathe freely in the water because we don't have a filtration system and can't get nutrients in the water, while the gills of fish happen to filter water and get oxygen in the water, so they can breathe freely in the water. But the gills of fish also need a certain amount of water to moisturize, so when Yu Lei leaves the water for a period of time, he will die. So fish are able to breathe in the water, not because they have nostrils, but because they have gills, which are unique bodily organs.

So nature is magical, and species under different living conditions have very different ways of living and body structure.

How do fish breathe underwater? Explain how fish breathe underwater in an easy-to-understand way? Explain how fish breathe underwater in an easy-to-understand way? The explanation is easy to understand.

When the fish breathes, the fish opens its gill and gill filaments completely, which can increase the contact area between the gills and the water, so that the fish can ventilate through the gills so that the fish in the water have no nostrils, they are called fish gills.

Fish do not use their nostrils to breathe in the water, and with the exception of whales and dolphins, most fish do not have lungs. They all breathe through their gills.

Fish do not have nostrils, and they have to breathe in the water, metabolize and exchange substances. Its respiratory organ is its gills. Gill are structures that fish specialize in adapting to breathing in water. When you leave the water, the gills will not function properly, and the fish will suffocate.

Fish breathe through the gills, the surface of the gill filaments is covered with capillaries, and the dissolved oxygen in the water is exchanged at the gill patches, and the oxygen enters the capillaries and is transported to the whole body with the blood circulation.

Fish breathe by their gills in the water, they do not have nostrils like humans, humans breathe by their lungs. The gills of fish are equivalent to human lungs.

Fish mainly rely on gills to breathe, and when water flows through the mouth, it is expelled through the gills. And the gills are also exchanged with the gas, so that oxygen is obtained. But there are also some fish that can breathe with **.

When a fish breathes in water, it mainly relies on its gills, and the water enters through the fish's mouth and exits through the gills, so this is how the fish breathe.

<> fish can live in water because they breathe with their gills and can take in oxygen from the water. When water flows through, the capillaries in the gill filaments can exchange gases with the water to obtain oxygen. Once out of the water, the gill filaments stick together, causing it to be unable to take in oxygen, and it will die.

However, some fish have a life-resistant auxiliary respiratory organ and can survive out of water.

When water flows through the gill filaments, the dissolved oxygen in the water enters the blood vessels of the gill filaments, and carbon dioxide is discharged from the gill filaments into the water, and the two carry out gas exchange

Therefore, the answer is: know the order in which oxygen enters the fish, that is, oxygen enters the mouth through water, passes through the gill filaments and then enters the bloodstream after gas exchange

The fish often opens its mouth and allows water to flow through the mouth of the fish over the red, feather-like thing.

This is the gills, which are made up of many tiny blood vessels, and the blood flows in them.

It seems to be catching something out of the water.

It's oxygen. Both animals and humans need oxygen to sustain life.

Watch the blood in the body transmit oxygen to the whole body of the fish through blood circulation. Carbon dioxide in the fish is also excreted from the gills into the water.

The gills are the respiratory organs of the fish, and with the gills, the fish can absorb the oxygen in the water and sustain life.

The fish needs oxygen, so it often opens its mouth wide in the water to let the water flow into its gills to absorb oxygen. The next time you see a fish open its mouth in the water, don't think it's drinking, it's breathing!

Summary. Hello, dear. Fish can breathe in water because they have gills, a special organ that allows each gill piece, gill filament, and gill segment to be fully opened, expanding the contact area between the gills and the water, and increasing the chance of ingesting the oxygen dissolved in the water.

There are microvessels in the gill patches, where the epidermis is very thin, and when the blood flows through it, the gas exchange is completed, and the carbon dioxide brought by it passes through the thin walls of the gill patches and is sent to the water; At the same time, absorb the oxygen in the water, why can the fish breathe in the water.

Hello, dear. Fish can breathe in water because they have gills, a special organ that allows each gill piece, gill filament, and gill segment to be fully opened, expanding the contact area between the gills and the water, and increasing the chance of ingesting the oxygen dissolved in the water. There are microvessels in the gill patches, where the epidermis is very thin, and when the blood flows through it, the gas exchange is completed, and the carbon dioxide brought by it passes through the thin walls of the gill patches and is sent to the water; At the same time, it absorbs oxygen from the water, and the oxygen is transported to all parts of the body with the blood circulation.

Due to the alternating opening and closing of the mouth and gill cover, water can continuously enter the oral cavity from the mouth, through the pharynx to the gill cavity, contact with the gill filament, and then discharge from the gill hole to the outside. Once out of the water, the gill filaments stick together, causing it to be unable to take in oxygen, and it dies. However, some fish have auxiliary respiratory organs and can survive out of water.

Fish, like us humans, inhale oxygen, exhale carbon dioxide, and cannot survive without oxygen. Humans breathe with their lungs, while fish breathe with gills.

Fish live in the water, and we see them swimming leisurely in the water, opening their mouths to take a few sips of water from time to time, and not running to the surface to breathe the air, so how do they absorb oxygen? It turns out that there are many dense capillaries in the gills of the fish, and the fish is not drinking water when it opens its mouth wide in the water, but breathing. It turns out that not only is there oxygen in the air, but also oxygen is dissolved in the water.

The water does not enter the stomach after entering the mouth of the fish, but flows out through the gills. When water flows through the gills, the oxygen in the water enters the capillaries and flows down the blood vessels to all parts of the body. Carbon dioxide in the body is also excreted from the body along the blood vessels. This is how fish survive by breathing incessantly in the water with their gills.

The gills of a fish can only absorb oxygen dissolved in the water and cannot breathe oxygen directly in the air. As a result, most fish suffocate due to lack of oxygen when they leave the water. Of course, there are also fish with "special functions", in addition to gills, they also have organs that can breathe air directly, and they later evolved into amphibians.

Because the gills are closed, the water that enters the mouth can be expelled from the body, leaving oxygen for gas exchange in the body, so the fish can breathe in the water.

When the fish is in the water, each gill plate, gill filament, and gill segment are fully opened, so that the contact area between the gills and the water is expanded, increasing the chance of ingestion of dissolved oxygen in the water. There are microvessels in the gill patches, where the epidermis is very thin, and when the blood flows through it, the gas exchange is completed, and the carbon dioxide brought by it passes through the thin walls of the gill patches and is sent to the water;

At the same time, it absorbs oxygen from the water, and the oxygen is transported to all parts of the body with the blood circulation. Due to the alternating opening and closing of the mouth and gill cover, water can continuously enter the oral cavity from the mouth, reach the gill cavity through the pharynx, contact with the gill filament, and then discharge from the gill hole to the outside, and the respiration of the fish is completed in this process.

Fish belong to the vertebrate subphylum of the phylum Chordates, and vertebrates are generally divided into five categories: fish (53%), birds (18%), reptiles (12%), mammals (9%), and amphibians (8%).

According to the statistics of the late Canadian scholar "Nelson" in 1994, there are 24,618 species of fish in the world, accounting for more than half of the named vertebrates, and new species of fish are constantly discovered, with an average of about 150 species per year, and more than 1,500 species should have increased in more than ten years, and there are about 32,100 species of named fish species in the world.

When water flows through the capillaries of the gill region, the oxygen dissolved in the water binds to hemoglobin through the walls of the blood vessels, and the carbon dioxide carried in the blood is dissolved in the water and excreted through the posterior edge of the gill operculum.

The gills are the respiratory organs of the fish, which are composed of gill filaments, gill rakers, and gill arches, and the main part is the gill filaments, which are densely packed with capillaries, so the gills are bright red. When water flows through the mouth and passes through the cheeks, the oxygen dissolved in the water seeps into the capillaries in the gills. The carbon dioxide in the blood, on the other hand, exudes out of the capillaries and is excreted from the body through the parotid hole at the posterior edge of the gill cover.

The gills are composed of gill filaments, gill rakers, and gill arches, which are abundant in capillaries, and in water the gill filaments spread out and are in full contact with the water. Water enters through the fish's mouth and passes through the gills, where it exchanges gases with the capillaries in the gill filaments. As a result, other substances such as oxygen in the water enter the fish's body, and other substances such as carbon dioxide in the fish are excreted from the body.

The fish has eight gills, each of which has many gill filaments, and the gill filaments are covered with capillaries, which are thin and long, which increases the contact area between the capillaries and the water, thereby increasing the area of gas exchange, which is conducive to the respiration of the fish.

Because fish don't have nostrils to get out of the air!

Gill The two gills of a fish function like a human lung, and their arched bone tissue contains reddish fibrous components.

Fish blood circulates through this red fibre before flowing into other organs and internal organs.

Once the blood has circulated through the gill fibers, the fish's blood is filled with oxygen and carbon dioxide is removed. The same principle is true for the human lungs.