What does a swim bladder do? What is the role and function of a swim bladder?

When cleaning up the fish and disemboweling, cut the body wall, you can see that there is a white bubble-like structure inside, take it out, pinch it with your hand, and feel the gas inside. You must be wondering, what is the purpose of this unique structure in the belly of a fish?

I opened the book and checked it, and saw that the book introduced that the white structure was a swim bladder. The function of the swim bladder is to store the amount of gas so that the fish can stop in different water layers.

We have all seen that animals that can't swim will sink to the bottom when they reach the water, but when the fish is motionless, they can also stay in a certain water layer and will not sink, which is the role of the swim bladder. The amount of gas in the swim bladder can be adjusted, if the amount of gas is reduced, the gas in the swim bladder will be released from the mouth through the swim bladder and esophagus, or will be absorbed and carried away by the blood flowing through the swim bladder; If the amount of gas increases, the blood flowing through the swim bladder releases oxygen and replenishes it into the swim bladder.

We can do such an experiment to indirectly verify this effect of the swim bladder. Prepare a relatively large jar, fill it with water, and put a small fish in it. Tighten the mouth of the bottle with a cork or rubber stopper, thread a small hole in the plug, insert a thin glass tube, preferably with a scale on the tube, if not, use a pen to draw several equidistant grids.

Apply petroleum jelly between the finish and the stopper, and between the stopper and the glass tube, to ensure that the inside of the bottle is sealed (Figure 57).

Okay, so let's take a closer look at the activities of the small fish and the changes in the water surface inside the glass tube. When the small fish rises from the lower level to the upper level, the water level in the glass tube rises. When the small fish descend from the upper to the lower level, the water level in the pipe also decreases. In order to see the rise and fall of the water level, the inner diameter of the glass tube should be thinner.

Why is this happening? It turns out that when the small fish swims from deep water to shallow water, the pressure of the water on the fish decreases, the gas in the swim bladder expands, and the volume of the fish also increases, so the buoyancy of the water on the fish increases, and the fish keeps rising. As the size of the fish increases, the water is squeezed outward, and the water surface in the tube rises.

At this time, if the fish wants to stay in a certain position, it must release some gas from the swim bladder.

When the small fish swim from shallow water to deep water, the pressure of the water on the fish increases, the gas in the swim bladder shrinks, and the size of the fish also decreases. At this time, the buoyancy experienced by the fish decreases and it will soon sink to the bottom. If the fish wants to stay in a certain position, it must increase the gas in the swim bladder so that it does not sink all the time.

Through this experiment, it was known that the swim bladder adjusted the internal gas content so that the fish could stay in any water layer. In the process of actively ascending and descending, the fish needs the coordination of various fins and tails.

However, not all fish have swim bladders, for example, some fish that have been living on the bottom of the sea, such as flounders, do not have swim bladders, because they do not float in the water and are subject to little change in water pressure. In addition, some fish living in deep water, their swim bladder ability to adjust the gas content is also relatively poor, when they are caught to the surface, due to the sudden decrease in external pressure, the gas in the swim bladder will suddenly swell, the abdomen is always bulging very large, and even can swell to death.

Fish bladders have the following effects:

1. Assist the fish in the water to lift and fall, and also use it as stability, located in the center of the fish's body, which can keep the center of gravity downward.

2. Make enough space in the abdominal cavity of the fish to protect its internal organs and avoid excessive water pressure and damage to internal organs.

3. Among lungfish and total fin fish, the swim bladder can be used as an auxiliary respiratory organ.

4. The swim bladder can be used as a resonant cavity to produce or receive sound.

5. In an oxygen-deficient environment, the swim bladder can be used as an auxiliary respiratory organ to provide oxygen to the fish.

Fish bladder, commonly known as fish bubble, is mainly composed of high-grade collagen, mucopolysaccharides, and contains a variety of vitamins and calcium, zinc, iron, selenium and other trace elements.

Modern Chinese medicine believes that fish maw is sweet and flat, nourishes blood and stops bleeding, and nourishes the kidney and strengthens essence. The use of fish darts in combination with traditional Chinese medicine can be used for peptic ulcer, tuberculosis, rheumatic heart disease, aplastic anemia and vasculitis and other diseases.

Recently, China's medical workers have also found that fish maw can enhance the digestion and absorption function of the gastrointestinal tract, improve appetite, is conducive to the prevention and treatment of loss of appetite, anorexia, indigestion, bloating, constipation and other diseases, fish maw can also enhance the toughness and elasticity of muscle tissue, enhance physical strength, eliminate fatigue; It can also moisturize**, make **delicate and smooth; It can also strengthen the brain and nerve and endocrine function, promote growth and development, maintain the normal secretion of glands, and can prevent and treat mental retardation, nerve conduction retardation, slow response, pediatric dysplasia, insufficient maternal milk secretion, elderly forgetfulness and insomnia, etc., because the swim bladder contains a lot of gelatinous juice, and has the effects of invigorating blood, replenishing blood, stopping bleeding, keeping out cold, dispelling dampness, etc., so it can improve the body's immunity.

The fish maw is cooked into a dish, which is soft and glutinous and smooth, and the taste is delicious. Folks often stew fish maw with longan, red dates, walnuts and rice wine around the winter solstice. Fish maw bladders can also be used to make medicinal diets. Try the following two.

Fish maw five-seed soup: 12 15 grams of fish bladder, 19 grams of sand garden seeds, 12 grams of dodder seeds, 15 grams of ligustrum seeds, 15 grams of wolfberry seeds, 9 grams of schisandra chinensis, six flavors are fried in water, water boils for 1 hour and then drink the soup, 1 dose per day, divided into 2 doses. It is used for the nourishment of people with kidney deficiency, and also treats spermatozoa, low back pain, tinnitus, dizziness, dizziness and other symptoms.

Fish maw gelatin soup: take 100 150 grams of fish maw gum, boil it in a pot, simmer and boil, after the fish maw gelatin is dissolved, it becomes a soup, and it is eaten in 4 or 5 days, heated and warmed before eating. It is used for epistaxis, epistaxis, thrombocytopenic purpura.

The swim bladder has two major functions: 1. The lifting of the fish does not depend on the swim bladder, but on the tail fin and pectoral fin. Fish in the water, in a stationary or semi-stationary state, consume the least amount of energy. The swim bladder plays a role in balancing the fish body when it is stationary.

The dorsal and pelvic fins ensure that the fish is in a vertical line. The fishing line on both sides is the balance detection line, and the fish backbone is the balance point of the center of gravity, which runs through the whole body to form a horizontal line. When a fish is at rest or semi-stationary in the water, the up-and-down movement is mainly by the pectoral fins.

The swim bladder keeps the body in balance and does not sink the fish because it is stationary. The buoyancy generated by the swim bladder just counteracts gravity, so that the fish body can freely control its body in a certain water layer when it is at rest.

2 The growth of the swim bladder grows with the growth of the fish body until the fish body stops growing and the swim bladder also stops growing. Its shape is determined by the shape of the fish body and the spatial structure of the abdominal cavity, so that the buoyancy generated at the points of the fish body cancels out the gravitational force generated by different parts. In the case of carp, the structure of the front and back parts of the swim bladder also evolved to adapt to the rapid turning of the fish's body.

It can bend quickly with the rapid deformation of the fish body, so as to quickly maintain the balance of the body and not cause the fish to roll over.

What part of the fish swim bladder is the fish.

Hello! The fish bubble is the auxiliary respiratory organ of the fish, which is usually called the swim bladder. The fish bubble is filled with gas, mainly oxygen, which can provide oxygen in case of hypoxia. This organ also has two important functions, which is to regulate the specific gravity of the body and protect its internal organs.

The most important function of fish fat is to adjust the proportion of the fish body according to the pumping and releasing air, and then adjust the pressure balance inside and outside the human body of the bony fish and control the rise and fall of the human body. When they swing, they require very little energy to maintain a smooth condition in the water.

The working pressure of the sea surface increases with the depth of the sea, and the increase in working pressure is a hindrance for the fish that want to swim in the deep sea. Therefore, when the fish wants to lower to the depths of the water, it will expel some of the gas from the waist of the fish, so that the fish body will be increased by a proportion, and it will be much easier to dive. On the other hand, if you want to rise to a higher water layer, you need to fill a part of the gas to make the fish fat bulge.

Fish bubbles are rich in a variety of vitamins and minerals, which can improve physical fitness and make the body healthier. The protein content in the fish bubble is also very rich, which can replenish the energy needed by the human body.