The role of the swim bladder in the body of the fish, what role does the swim bladder play in the fi

Fish bladder plays an important role in the process of fish ups and downs.

Helps the fish to adjust its depth in the water.

Adjust the height in the water.

Fish bladders have the following functions:

Clause. 1. Assist the lifting of the fish in the water, and also use it as stability, because the center of the fish's body can keep the center of gravity downward.

The contraction and expansion of the swim bladder can change the content of air in the body and adjust the density of the body, and the buoyancy generated in the water will also change accordingly to achieve the purpose of rising or sinking. When the fish dives, the swim bladder muscles contract, the space becomes smaller, and the air pressure becomes larger to counteract the action of the water pressure. When the fish floats, the water pressure becomes smaller, the swim bladder muscles relax, the space becomes larger, and the air pressure becomes smaller.

The swim bladder muscle controls the amount of pressure on the swim bladder and determines the different waters in which different fish species live. Fish bladders have thick muscles and are highly stressed. It lives in deeper waters and is a deep-water (sea) fish.

On the other hand, it can only be active in shallow water (sea).

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.

Cartilaginous fish do not have a swim bladder, so they cannot keep their bodies still, and can only swim constantly to maintain their upper and lower balance, and sharks are one of them. The pressure in the swim bladder of deep-sea fish is high, and once it is out of the water, the compressed gas is released, which expands the swim bladder. Once a shallow water fish gets sick or dies, the balance line on both sides of the fish body, the buoyancy generated by the swim bladder is different from the gravity center point generated by the fish body, causing the fish body to roll over and float up, and the belly of the fish is facing upward.

Clause. 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.

Clause. 3. Among lungfish and total finned fishes, the swim bladder can be used as an auxiliary respiratory organ.

Clause. Fourth, the swim bladder can be used as a resonant cavity to produce or receive sound.

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

The role of the swim bladder is numerous. First of all, it can change its density by inflating and exhausting, so as to better float and dive. Secondly, it also protects the organs from damage caused by too much water pressure.

In addition, for some fish, the swim bladder can assist breathing, allowing them to breathe after leaving the water. Some fish can also use their swim bladders to make sounds, and most are males who rely on their sounds to court. <

Most bony fish have a swim bladder, and for them, the biggest role of the swim bladder is to adjust the density of the fish. The more gas there is, the smaller the overall density of the fish, so that it can float better, and similarly, after the gas is discharged, the density of the fish increases, which makes it easier for it to dive.

Fish maw also has a very important role is to protect the organs in the fish, especially for fish living in the deep sea, due to the high water pressure, so the internal organs are easily damaged, through the swim bladder to produce enough space in the body, the organs will not be affected by the water pressure.

Fish need to breathe with gills, but there are some fish that can be breathed with a swim bladder, such as the African lungfish. The swim bladder of this fish is special, there are many small air chambers around the cavity, which can store a certain amount of gas, and when the water body dries up, you can obtain oxygen through this lung-like swim bladder.

Fish also make sounds, but the organs that make sounds are not consistent, and some fish can make sounds through their swim bladders. Many of the fish that make sounds are males, and when they reach the breeding season, they make sounds to attract females and thus mate and reproduce.