How the gill covers on both sides of the fish s head change when the fish s mouth is opened

The respiratory system of fish is gills. On both sides of the head, there are two large gill covers, and the cavities inside the gill covers are called gill cavities. Lifting the gill cover, you can see that there are four gills on each side of the throat, and each gill is divided into two rows of gill pieces, each row of gill pieces is composed of many gill filaments arranged in an arrangement, and many small gill filaments are born on both sides of each gill filament.

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: the carbon dioxide brought by 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.

Summary. Hello, the fish shake their head and tail is suffering from pintail disease, suffering from pintail disease because of poor water quality or water temperature is not suitable, after finding this situation, it is necessary to change the water in time to stabilize the water temperature at 28, when the fish is in a suitable environment, the phenomenon of shaking the head and tail will disappear. <>

The gills on both sides are open, and the head and tail are swinging.

You are good, the fish shake their heads and tails are the feast is ruined and do not have needle tail disease, suffering from needle tail disease is caused by poor water quality or water temperature is not suitable, after finding this situation, you should change the water in time to stabilize the water temperature at 28, when the fish is in a suitable environment, the phenomenon of shaking the head and tail will disappear. <>

Will it be contagious, and what medicine to use to clean the fish tank when the fish die.

Hello, this is generally not contagious, this is due to the water quality

The following methods can be used for disinfection: 1. Salt, which is safe, effective, and convenient. Add 100-300 grams per 10 kg of water, that is, prepare 1-3% concentration of salt water, disinfect for about 5-20 minutes, and the length of bathing time depends on the water temperature, which can kill most germs and parasites.

2. Potassium permanganate can be added directly to the fish tank. The concentration of the drug is 10 kg of potassium peracid in water. The weight of grams of potassium permanganate is inconvenient.

Therefore, first weigh 1 gram of potassium permanganate fully dissolved in 1 kilogram of water such as the first worm, that is, prepare a thousandth concentration of the liquid, store the worm in the Coca-Cola bottle for later use, and then use a straw or needle to absorb 30 ml of potassium permanganate solution and add it to 10 kg of water, and change the water when the 24 small ones are started after the use. However, it should be noted that for small tropical fish. The toxicity of potassium permanganate is greater, and it is necessary to pay attention to observe the activity status of tropical fish after taking medicine, and immediately rescue if there is an abnormality, that is, a large amount of water change or fish out of tropical fish.

This fish in the same tank, the dorsal fins are closed, and there is something red on the head??? Pinocchiocerosis is confirmed.

It's just that there are red things on the head, right?

This may be a ** disease, which should also be caused by water quality problems

Hello, the water you raise fish also looks relatively turbid, so you need to improve the water quality as soon as possible, and the symptoms of the fish will be improved

Or is it because he is white**, and then you can see a little red!

That's right, the general ** disease is red, so it is more obvious to grow some red things on the white**.

The fish opens its mouth to the surface of the water, because of the lack of oxygen in the water, then the fish will float to the surface, the mouth opens and closes, and sometimes it will make a "horn, horn" sound, trying to breathe oxygen from the empty oxygen, and the argument can also be understood as the fish is sending a respectful distress signal to the owner.

How to avoid floating heads: Pay attention to the stocking density of fish when raising fish. Because fish like a large activity space, beginners often see their favorite fish to buy, rarely take into account how many fish can be raised in the tank, so it leads to the situation of more fish and less water, then the fish will float to absorb oxygen, so when raising fish, we must pay attention to 3 liters of water to raise a centimeter-long fish is more appropriate.

When the mouth is opened, the gill covers on both sides of the fish's head are closed, which plays a role in respiration.

Operculum branchial mantle, branchiostegite

1. In bony fishes, the gill interval is retracted and becomes a full gill flap, and most of the gill flaps become free, and the gill cover covering the outside of the gill slit is very developed in order to protect the gill lobes. Operculum towards the outer wall of the second visceral arch. It is born into a flattened fold with an inner lumen called the gill cavity (also known as the gill compartment).

2. The operculum is communicated with the outside world by the opercular slit at the rear end. Sharks and rays have underdeveloped gill covers, and gill slits open directly to the outside. In addition, the larvae of tailless species have a well-developed gill cover similar to that of bony fish, but most of its posterior end is connected to the abdomen**, and only a small hole (breathing hole) equivalent to the operculum gap remains on the left side of the body.

3. When the mouth is opened, the gill cover is closed, so that a negative pressure can be formed to suck the water in.

4. After the mouth is closed, open the gill cover and press the water through the gills to obtain oxygen.

The mouth of the fish opens and closes, and the gill cover closes and opens.

1.Fish live in water, and their mouths and gill covers alternately move. Water enters through the mouth and flows out of the gill holes.

2.The back is dark gray, and the natural predators look down from above the water, and the back of the fish that is dismantled from the black brother is the same color as the silt at the bottom of the river, so it is difficult to find;

The abdomen is white, and if the natural predator looks up from under the water, it is difficult to find because the white fish belly is similar to the color of the sky.

It is a protective color.

3.The body shape of the fish is fusiform, which helps to reduce the resistance when swimming.

That's basically it.

The gill cover of the fish is a one-piece variation;

This movement is the process by which the fish obtain oxygen from the water body, that is, the exchange of blood with external gases for respiration.

Quite simply, with the mouth open the cheeks followed by an opening.

Pudong Development Sail shares are all the same.

Fish live in the water all their lives, observe the live fish, you can see that the mouth of the fish and the posterior edge of the gill cover have alternately closed, this is the fish in the breath Fish breathe with gills, there are many gill filaments on the gills, the gill filaments are densely covered with capillaries, when the water flows from the mouth, when passing through the gill filaments, the oxygen dissolved in the water penetrates into the capillaries in the gill filaments, and the carbon dioxide in the blood leachs out of the capillaries, discharges into the water, and is discharged from the body with the water from the gill hole on the trailing edge of the gill cover, so the fish keeps swallowing water and is actually breathing

So the answer is: breathe; Oxygen; Carbon dioxide.

The process of fish respiration goes like this:

1: Open your mouth, close your gill covers, stretch your body, and suck water into your body from your mouth.

2: Shut up, open the gill cover, contract the body, and expel water from the gills, while oxygen and carbon dioxide are exchanged through the capillaries on the gills.

So the gill cover and mouth do not open and close at the same time.