The internal organs of the crucian carp, the internal structure of the crucian carp

The respiratory organs of crucian carp are gills. Gill are structures that are specially adapted to breathe in water. Each gill is composed of gill segments and gill filaments.

When breathing, the gill and gill filaments open completely, increasing the area where the gills are in contact with water. Fish breathe in the water with their mouths open and closed; When it opens its mouth, it sucks in water and closes the operculum, and when it closes, it opens to allow water to flow out. At the same time, carbon dioxide is discharged into the water.

The main use of the swim bladder is not to breathe, the fish rely on the swim bladder to regulate their specific gravity, through the swim bladder they can slowly rise or fall without movement, most bony fish have the swim bladder, which is an organ that regulates buoyancy. The swim bladder is originally an extension of the intestines, and some fish, such as the carp, are still connected to its intestines, while others, such as the swim bladder of the perch, have been completely separated from the intestines. If a fish wants to reduce its specific gravity, it releases dissolved gases in the blood into the swim bladder, some using an oval in the swim bladder to inflate, while others pass through the intestines and a tube that connects the intestines to the swim bladder (ductus pneumaticus).

In the same way, fish can also increase their specific gravity by dissolving the gas back into the bloodstream. The swim bladder can also be used as an organ for vocal resonance.

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The main purpose of the swim bladder is to adjust their specific gravity and buoyancy, so that they can slowly rise or fall without movement. The gills are used for breathing.

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The internal organs of a crucian carp are about ten grams. Because crucian carp usually don't grow big, the largest is only a few pounds, usually two or three weights, and the heaviest in the stomach is a fish intestine, so the internal organs of crucian carp are very light. In fact, not only crucian carp, but basically all fish have not very heavy internal organs.

There are large fish such as carp, grass carp, and bighead carp, and their internal organs are about 20 grams.

The consumption of crucian carp is contraindicated.

1. It is not advisable to eat more during the period of cold and fever.

2. Caviar contains high cholesterol content, which is not suitable for the elderly, patients with high blood lipids and high cholesterol.

3. Eating crucian carp can have the effect of supplementing protein, making soup can have the effect of milking, and at the same time, it can also supplement rich nutrients, which can promote metabolism and replenish brain intelligence.

(1) As can be seen from the figure, the body of the crucian carp is streamlined, the trunk and tail are covered with scales, and there is mucus on the surface of the scales, which has the effect of reducing the resistance when swimming

2) In the figure, it is the gills, which are the respiratory organs of the crucian carp, and the gills are characterized by the fact that each gill is composed of many gill filaments, which contain abundant capillaries, which can fully carry out gas exchange in the water The role of the fins is to swim and balance the organs, and the fins are divided into pectoral fins, pelvic fins, dorsal fins, anal fins and caudal fins

3) In the picture, it is a swim bladder, which is filled with gas, which can adjust the specific gravity of the fish's body, and with the assistance of fins, the fish can stay in different water layers

4) In addition to the above characteristics, the characteristics of crucian carp suitable for water are: The back of the fish body is dark gray-black, and the ventral surface is white, which is not easy to be found by predators above and below, which is a protective color; There is a lateral line on each side of the body, which is the sensory organ of the fish, which can sense the current and determine the direction

Therefore, the answer is: (1) streamline; Mucous; Reduces resistance when swimming;

2) gills; gill filaments; Fins;

3) swim bladder; Gas; different water layers;

4) The back of the fish body is dark gray-black, and the ventral surface is white, which is not easy to be found by predators above and below, and is a protective color; There is a lateral line on each side of the body, which is the sensory organ of the fish, which can sense the current and determine the direction

Summary. Common names of sea crucian carp: nine-nine fish, sea catfish, crucian carp, sea knife.

China is found in the northern part of the Yellow Sea and the Bohai Sea. The body is covered with smaller, thin, rounded scales. dorsal fin spines with well-developed scale sheaths extending posteriorly to the fin bars; When folded, the fin spines can be stored in the groove.

The eyes are bright, the scales are bright, the gills are bright, and the fresh fish that is not long out of the water is straight, and does not bend. During the reproductive season, males have distinct glandular bodies on their anal fins; Fin bars extended. The hypopharyngeal bone is healed, elongated, and has small teeth.

Cold-temperate inshore fish. The body length is generally 160 230 mm. Ovoviviparous, the uterus of the female is divided into multiple chambers, and each litter lays 30 to 50 small fish.

It is often caught in the Yellow Sea.

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Hello dear. The lack of internal organs in the crucian carp is due to the fact that the fish seller disposed of it. Sea crucian carp is visceral and includes part of the digestive system, respiratory system, cloaca system and circulatory system.

It includes the digestive tract composed of the oral cavity, pharynx, food and intestines, and the digestive glands composed of the liver and pancreas and gallbladder. [Flowers and dates] <>

Common names of sea crucian carp: nine-nine fish, sea catfish, crucian carp, sea knife. China is found in the northern part of the Yellow Sea and the Bohai Sea.

The body is covered with smaller, thin, rounded scales. dorsal fin spines with well-developed scale sheaths extending posteriorly to the fin bars; When folded, the fin spines can be stored in the groove. The eyes are bright, the scales are bright, the gills are bright, and the fresh fish that is not long out of the water is straight, and does not bend.

During the reproductive season, males have distinct glandular bodies on their anal fins; Fin bars extended. The hypopharyngeal bone is healed, elongated and sizzle, with small teeth. Cold-temperate fish that mimic the waters of the water.

The body length is generally 160 230 mm. The eggs are large and rotten and viviparous, and the uterus of the female is divided into multiple chambers, and each litter produces 30 to 50 small fish. It is often caught in the Yellow Sea.

I killed it myself. Crack open the stomach and find that there are no internal organs inside. The appearance of the fish is intact.

Dear, did you buy it at the vegetable market or **?

I just bought it at the wet market. I don't dare to eat it now.

Dear, it is recommended not to eat it, there are no internal organs, if it is not taken out by the fish seller, then there is a situation where the parasite eats it.

Fish is a good ingredient, it is a high-quality protein**, not high in fat, and also contains unsaturated fatty acids. However, due to water pollution, fish are prone to accumulating heavy metals, such as methylmercury, which mainly invades the central nervous system and can cause speech and memory impairment. Therefore, some parts of the fish must not be touched, it is more poisonous than arsenic, let's take a look!

Fish gall bladder. Rumors have been circulating about eating fish gallbladder to cure diseases, but the fact is that many fish gall bladders are poisonous, and freshwater fish such as herring, grass carp, silver carp, sea bass, and carp contain very toxic bile toxins in their fish gall bladders, because bile toxins are not easily destroyed by heat and ethanol (alcohol).

Therefore, whether swallowed raw, cooked or taken with wine, adults who ingest more than one gram at a time are very likely to cause poisoning, and even make the poisoned person die, a 1-2 kg fish, fish gall bladder can reach or even exceed this dose.

Therefore, when cleaning the fish guts, be sure to remove the fish gall bladder. If it breaks, be sure to wash it thoroughly, and be careful not to get the juice in your eyes.

Fish roe and fish bubbles can be eaten, but don't eat anything else. The crucian carp is not too big, and the fish intestines are difficult to clean, so don't ask for them.

Under normal circumstances, if the fish bubble and fish intestines will be cleaned, you can eat it, but if it is recommended, you won't get it yourself, and it is best not to eat these internal organs, after all, it is not so clean and hygienic.

, causing the fish's abdomen to swell. In addition, taeniasis is a zoonotic disease, and eating contaminated fish by mistake will cause harm to human health.

The sparrow is young and has all kinds of organs. It's just one more bubble! There are no lungs.