Continental snails are not the name of a biological classification. They generally refer to all terrestrial species of the class Gastropoda. Generally speaking, Western languages ??do not distinguish between aquatic snails and terrestrial snails. In Chinese, snails only refer to terrestrial species. Although they also include many animals of different families and genera, their shapes are all similar. Snails are molluscs, class Gastropods; they feed on decaying plant matter and lay eggs in the soil. Most common on tropical islands, but also found in colder regions. Arboreal species are brightly colored, while ground-dwelling species are usually monochromatic. The African agate snails are the largest, exceeding 20 centimeters. Several species of the European giant snail are often delicacies, especially in France. Snails are one of the most common molluscs on land and have high edible and medicinal value. Jay Chou composed the song "Snail"; there is also "Snail Poetry". There are about 22,000 species of living snails. Most belong to the gastropod class. Pulmonata (Pulmonata), and a few belong to Prosobranchia. (feeds on decaying plant matter and lays eggs in the soil. Most common on tropical islands (such as Cuba), but also found in cold areas (dormant in winter). Arboreal species are brightly colored, while ground-dwelling species are usually monochromatic. African The genus Achatina is the largest, reaching more than 20 cm (8 inches). Several species of the genus Achatina are often used as delicacies in Europe, especially in France. See the gastropod article. Snails have the largest teeth in the world. The largest animal. Although its mouth is about the size of a needle, it has 25,600 teeth. There is a small hole in the middle of the snail's small tentacles. This is its mouth, and there is a serrated tongue inside. , scientists call it "radula". Snail is not the name of a biological classification. It generally refers to all species of animals in the family Snailidae. In a broad sense, it also includes some animals in other families of Gastropods (including slugs, etc.). Generally speaking, Western languages ??do not distinguish between aquatic snails and terrestrial snails. In Chinese, snails only refer to terrestrial species. Although they also include animals of many different families and genera, the shapes of snails are relatively fragile and low. shaped shell, different types of shells are left-handed or right-handed, with two pairs of tentacles on the head, the latter pair of longer tentacles have eyes at the top, and flat and wide abdominal feet on the ventral surface. They move slowly and secrete mucus under the feet to reduce friction. The mucus can also help prevent ants and other common insects from invading. Snails generally live in relatively humid places and avoid direct sunlight among plants. Snails that live in cold areas will hibernate, and species that live in the tropics will also hibernate during the dry season. The snails will go dormant. The mucus secreted during dormancy forms a dry film to seal the shell opening, and the whole body is hidden in the shell. When the temperature and humidity are suitable, they will come out and move around. Snails are distributed almost all over the world, and there are different types of snails in various shapes and sizes. Differently, African giant snails can be up to 30 centimeters long, and the wild species in the north are generally less than 1 centimeter. Generally, snails feed on plant leaves and buds, so they are an agricultural pest, but there are also other species of carnivorous snails. Snails are eaten. Now this artificially bred edible snail has spread all over the world along with French cooking. Snails are hermaphroditic, and some species can reproduce independently, but most species require two individuals to mate and exchange sperm with each other. Lay the eggs in moist soil, and the snails will usually emerge after two to four weeks. They can lay 100 eggs at a time. Chickens, ducks, birds, toads, turtles, snakes, and hedgehogs all eat snails. As food, firefly snails (7 photos) mainly feed on snails. Generally, snails can live for 2-3 years and up to 7 years, but most of them may become food for other animals in various cultures. The symbolic meanings of snails are also different. In China, snails symbolize slowness and backwardness; in Western Europe, they symbolize tenacity and perseverance; some people use the actions of snails to predict the weather. The Fingren believe that if the snail's tentacles extend very long, it will bring good luck. It means there will be good weather tomorrow. Snails have high edible and medicinal value. They are rich in nutrients, delicious, high-protein, low-fat, low-cholesterol, and rich in more than 20 kinds of amino acids. Snails are terrestrial molluscs of the gastropod class, with many species found all over the world. According to relevant records, there are 40,000 species of snails around the world. Snails are found in all provinces and regions in my country, living in forests, shrubs, orchards, vegetable gardens, farmland, parks, gardens, temples, mountains, flatlands, hills and other places. However, there are very few species that are worthy of feeding and eating. As a high-protein and low-fat high-quality food and animal protein feed for humans, snails are increasingly valued by people.

Snails are one of the most common molluscs on land. They mainly feed on plants, especially the buds and leaves of crops. Therefore, wild snails are more harmful to crops. With the development of science, people have turned disadvantages into advantages and raised snails artificially, so that snails can provide humans with snail meat with high nutritional value. Appearance features: The entire body of a snail includes eyes, mouth, feet, shell, antennae and other parts. It carries a spiral shell on its back. Its shells vary in shape, color and size. Their shells include pagoda-shaped, gyro-shaped, conical, spherical and pipe-shaped. Shape and so on. At present, the domestically cultivated white jade snails, covered large snails, loose large snails, bright large snails, brown cloud agate snails, etc. all have their own unique appearance. Snails have eyes on their antennae. Edit this paragraph anatomy diagram 1. Shell 2. Liver 3. Lungs 4. Anus 5. Breathing hole 6. Eye 7. Antennae 8. Brain ganglion 9. Salivary duct 10. Oral cavity 11. Crop 12. Salivary gland 13. Reproduction Hole 14. Penis 15. Vagina 16. Mucous gland 17. Fallopian tube 18. Sagittarius 19. Foot 20. Stomach 21. Kidney 22. Mantle 23. Heart 24. Vas deferensEdit Various types of snails are terrestrial shellfish Animals, snails have been living on the earth since ancient times. There are many kinds of snails, about 25,000 kinds, found all over the world, and there are thousands of kinds in my country alone. Snails are not edible except for medicine. There are about 11 species of edible value in my country, such as brown cloud agate snail, tall ring mouth snail, Hainan hard snail, wrinkled hard snail, Jiangxi bar snail, Malovian bar snail, white jade snail, etc. There are three main types of snails that are used as food and artificially cultured around the world: French snails (20 photos) are also called grape snails. They are named because they mainly live in grape plantations and feed on grape stems, leaves, buds, fruits, etc. . Because it looks like an apple, it is also called the apple snail, and its scientific name is the giant snail. Liangda snail varieties are produced in France, Italy, the former Soviet Union and other countries. Temperature is basically the same as the adaptation limit of large snails. This breed can weigh up to 400 grams. The shell is spherical, with a height of 28~35mm and a width of 45~60mm. The shell is thick, solid, opaque, and has 5.0 to 5.5 whorl layers. The spiral part grows slowly and is low conical in shape. The body whorl layer is enlarged, the shell mouth does not tilt downward, and the shell surface is dark yellowish brown or yellowish brown, shiny, and has multiple dark brown bands. The top of the shell is blunt, and the umbilicus of the adult is covered by the axial lip. The shell mouth is oval in shape, with sharp edges and folded lips, and the inner substance is light yellow or light brown. The garden snail is a snail belonging to the "Halricus" snail, native to France, the United Kingdom and other regions in central and western Europe. It usually lives in gardens or bushes, so it is called a "garden snail", also called a large snail. The adult snail is slightly smaller in size, with a diameter of about 3 cm. The shell is thin, yellow-brown, with 4 purple-brown bands, and the surface of the shell is covered with many small yellow-brown spots. At present, the large snails farmed in my country are small in size and have poor economic benefits due to species degradation. Agate snails are called Lu snails in Taiwan and are called Dongfeng snails, cabbage snails or flower snails in Guangdong. They belong to the agate snail category. The agate snail is native to the Malagasy Island in East Africa and later spread throughout the tropics. It is the largest snail in the world, so it is also called the African giant snail. The snail is cone-shaped, and the surface of the snail shell is covered with a layer of yellow-brown shell with dark brown patterns. Usually the shell of an adult snail is about 6 to 8 centimeters long, 3 to 4 centimeters wide, and weighs more than 50 grams. In western Africa, especially residents of the Gold Coast, snails are considered the only animal protein. Due to the delicious taste of this snail meat, it is very popular among European and American bosses, causing the African giant snail to become the staple food snail in the world today. This kind of snail is a species that is more adapted to growing under my country's natural conditions. At present, the species commonly cultivated in my country is called white jade snail, also known as white-meat snail. It is named after its snow-white flesh color. White jade snail anatomy diagram belongs to the phylum Mollusca, class Gastropod, and terrestrial shellfish. Hermaphroditic, among all the large families of edible snail species in the world, it is the best. White jade snail is one of the special animals in my country. It has special value, special nutrition, special flavor, and special use. Its meat is thick and nutritious, high in protein, low in fat, and rich in more than 20 kinds of amino acids. It is also the best nourishment for astronauts and athletes. Taste. It is a variant of the agate snail. Its peculiarity is that the muscles of its head, neck and feet are different in color, but its shape and living habits are no different from those of the brown cloud agate snail. The breeding methods are basically the same, except that the requirements for hygienic conditions are higher during breeding, and other The economic value of export sales is also higher.

Edit this paragraph Living environment Snails like to live in a dark, humid, loose and humus-rich environment. They live day and night and are most afraid of direct sunlight [1]. They are sensitive to the environment and are most suitable for an environment with a temperature of 16 to 30 degrees Celsius. ℃ (the growth and development are fastest at 23-30℃); air humidity is 60%-90%; breeding soil humidity is about 40%; pH is 5-7. When the temperature is lower than 15°C and higher than 33°C, it sleeps. If it is lower than 5°C or higher than 40°C, it may freeze to death or heat to death. Snails like to dig into loose humus soil to inhabit, lay eggs, adjust body humidity and absorb some nutrients, which can last up to 12 hours. Omnivory and partiality coexist. Likes moisture and is afraid of flooding. The snail's appetite is active during humid nights and when fed wet food. But flooding can suffocate snails. Self-feeding survival. As soon as the baby snails hatch, they will crawl and feed without maternal care. When infested by enemies, its head and feet retract into the shell and secrete mucus to seal the mouth of the shell; when the shell is damaged and disabled, it secretes certain substances to repair the body and shell. Have great patience. Snails have amazing survivability and are very tolerant of cold, heat, hunger, and drought. Like constant temperature culture. The temperature is constant between 25 and 28°C, and growth, development and reproduction are vigorous. When the snail crawls, it will leave a line of mucus on the ground. This is a liquid secreted by its body. There is no danger even if it walks on the edge of a knife. Edit this paragraph Life habits Excretion Snails excrete in places close to the breathing holes, called stomata. It excretes feces on its body, passing through its gastropods and mucus, eventually leaving the feces on the ground. Respiration: The mantle cavity of the snail will form an opening at the mouth of the shell, called a "breathing hole", which is where gases enter and exit. If you observe carefully, you will find that the breathing hole often opens and closes, just like the "nose" used by the snail to breathe; and when the snail retracts into the shell, it still leaves the opening of the breathing hole at the mouth of the shell for breathing. The mantle is often found between the feet or viscera, forming a cavity connected to the outside world, called the "mantle cavity." The respiratory organs of the snail are hidden in the mantle cavity. Sometimes through the snail's shell, you can vaguely see the dense pulmonary blood vessel network under the shell. Most of them are located on the front side, close to the head. This is the location of the mantle cavity. . The feeding habits of snails are very wide. They mainly eat various vegetables, weeds and melon and fruit peels; leaves, stems, buds, flowers and juicy fruits of crops; various grassy highland barley feeds, juicy feeds, bran-based feeds, etc. Eat all cakes and rice feed. Snails eat by mouth. Edit this paragraph If you put an ordinary snail with interesting features (such as a snail found on a tree after the rain) in a glass, cover the mouth of the cup with a piece of cardboard (you can put some water and leaves in the cup ), cut a few small holes on the cardboard to keep the air flowing, then the snails will climb on the cardboard, just leave the glass alone for a day, and on the next day, you will find There are some unknown black objects in the glass, which are snail droppings. When you open the cardboard, you will find that part of the leaves have been eaten. It is more active when there is air circulation, otherwise it will be dormant most of the time. Edit this paragraph Growth and reproduction Growth period 1) Incubation period: refers to the period from the time when the snail lays an egg to when it hatches and hatches out of its shell. 2) Young snail stage: Young snail refers to the small snail stage within 30 days after hatching. 3) Adult stage: The young snail is between 1 month and 6 months old. This 5-month-old snail is called the adult stage. It is the period between young snails and seed snails. This stage of snails is a period of growth and development (individual enlargement) and reproductive growth (growth and development of sexual organs). 4) Snail breeding period: snails that have grown for more than 6 months. Reproductive characteristics: When two snails meet, they touch each other with their antennae, then their heads face each other, their bodies are connected, and their reproductive cavities are connected. After this pause for a while, the genital parts suddenly reversed, and each other inserted the Renya (penis) into the other's reproductive hole. Generally speaking, the mating time of snails is very long, each handover takes about 2-3 hours, and sometimes it can last up to 4 hours. After mating, the fertilized egg is released outside the body through the genital pore. The eggs are laid in the soil several millimeters deep underground or under dead wood or fallen leaves. The larvae of the snail develop in the egg shell, and the hatched larvae already look like snails. 1. Snails are hermaphrodites, mate with each other, and both males and females lay eggs. The snail itself acts as both father and mother. The two snails cooperate with each other, and the two snails repeatedly stimulate each other's genital holes with their penises. After intense thrusting movements, the penises of both sides insert into the other's vagina and ejaculate.

After 10 days of conception, both parties can lay eggs, and 8 days later the eggs can hatch into small snails. 2. Mating takes a long time, spawning is slow and difficult. The mating time of snails in estrus lasts for 2 to 3 hours each time, and some last for more than 6 hours. Snails can lay 2 eggs per minute, and each egg laying time lasts for 1 to 2 hours, and some take more than 3 hours. During the process of laying eggs, snails often die due to poor nutrition, collapse and dystocia. Some deaths due to dystocia account for about 30% of the total number of snails. 3． The reproduction rate is high. Each snail can lay eggs 6 to 7 times a year, with an average of 200 eggs each time. A snail weighing 35 grams can lay 120 eggs each time, a snail weighing 40-50 grams can lay 150-180 eggs each time, and a snail weighing 60-100 grams can lay 300-400 eggs each time. grain. 4. Snail reproduction is not limited by age. Under the same suitable reproductive conditions, the larger the snail, the more eggs it will lay. 5. Shorter lifespan. The life span of snails is generally 5 to 6 years. Under uncomfortable living conditions, the death of snails will be accelerated and the life span of snails will be shortened. 6. Three are slow, two are fast, one is difficult and one is more. The three slownesses are slow movement, slow mating and slow egg laying; the second fastness is fast growth and shell shrinkage; the first difficulty and the more are difficulty in laying eggs and more eggs are laid. Edit this paragraph hazards and prevention: The same type of snail will use citrus fruit trees as its host. The citrus leaves are often eaten by it, and the cortex of the branches is also often eaten. The citrus fruits are formed into pits after feeding. Its host plants include forest seedlings, vegetables and flowers. Snails cause harm to soybeans in the seedling stage. In the mildest cases, they cause damage to the leaves and stems, delay the emergence of stiff seedlings, and reduce the seedling rate; in worst cases, they eat up all the bean seedlings, resulting in sterile patches. To prevent and control snails in soybean fields, comprehensive measures should be taken. Cleaning the fields: After harvesting summer crops or vegetables, timely eradicate weeds in fields, ridges, and ditch edges, dig ditches to reduce humidity, and cultivate and turn the soil to worsen the environment for snail growth and reproduction. Eliminate adult snails. In late spring and early summer, especially before the peak snail breeding period from May to June, adult snails should be eliminated in time. The first is to raise chickens and ducks to feed into snails. Note that this needs to be done when pesticides are not used. The second is artificial cochlear picking. When working in the field, we see snails picked up, either by trapping them with grass or vegetables and picking them up, or by picking up snails manually. This can achieve twice the result with half the effort. Chemical control: With the goal of protecting soybean seedlings, chemical agents are used to control snails when the snail population is large and is about to enter the peak period of damage. Use 300g of paraformaldehyde, 50g of sucrose, 300g of 5% calcium arsenate and 400g of rice bran (saute in the pot first), and mix into soybean-sized particles; use 0.5 to 0.6kg of 6% Milda molluscicide granules per acre or Mix 1.5-3kg of 3% Miewuling granules with 10-15kg of dry fine soil and spread it evenly in the field. The ditch edges and wetlands where snails like to live should be appropriately re-applied to minimize the harm caused by snails. Edit this paragraph Weakness: Salt reacts to the surface of the snail. Because there is a layer of mucus on the surface of the snail (except the shell), which is conducive to the movement of the snail and the skin to assist breathing. When you sprinkle salt, the movement and breathing ability of the snail are reduced. The mucus seeps out of the body, causing the snail's body to shrink and its cells to become dehydrated. At this time, the snail seems to be dried out in the sun. But it will never turn into water. Edit this section. Natural enemies. The most deadly natural enemy of snails is fireflies (the larvae eat away at the snail's body, and the adults eat away at the body of the snail. The fireflies lay eggs inside the body of the snail). The fireflies inject a toxin to paralyze the snail and turn it into liquid, which it then slowly eats. (If you want to know more, you can check Fabre's "Insects") There are also snail carabid and mice. Some natural enemies that are not easy to find include some parasitic wasps and "white mites". White mites should be a kind of white bugs. There are many They live in groups and feed on the body fluids and epidermal mantle of snails or slugs. They do little harm in a short period of time, but if they become large, they can cause fatal harm to snails. It should be eliminated as much as possible. When the snail is not active, use the raw bones with residual meat to attract them. Take out the bones after one morning. This can reduce the parasitism of mealy mites! The reason for this situation is that the feeding environment is not good! Residues and excrement are not cleaned up in time, or the humidity and temperature are too high. Edit this paragraph value: Medicinal value: There have long been records of using snails to treat diseases in the "Compendium of Materia Medica". Modern Chinese medicine also recognizes that snails have the functions of clearing heat, detoxifying, reducing swelling, and curing thirst, and have auxiliary therapeutic effects on diseases such as diabetes, hypertension, hyperlipidemia, tracheitis, prostatitis, malignant sores, and cancer. Efficacy; reduce swelling and treat sores, contract anus and prolapse, facilitate urination, application and indications: treat swelling and poison; treat sores at the beginning; treat scrofula; treat tooth pain; recently, the Russian Academy of Sciences is currently studying advanced neural activity and neurophysiology. Attempts to treat Parkinson's disease using neural tissue from molluscs such as snails.

Parkinson's disease is caused by the gradual degeneration of cells in the substantia nigra of the brain and the cessation of secreting the neurotransmitter dopamine. The main symptoms are muscle stiffness and tremors in the hands and feet. Studies have found that mammals have a weak ability to reject mollusc tissue. Researchers implanted snail neural tissue into the brains of mice, and the snail nerve tissue was compatible with each other for more than 6 months. After further improving the technology, Russian experts have been able to fuse snail neural tissue with the brain tissue of mice suffering from Parkinson's disease and gradually restore the brain functions of the damaged mice. Based on the above results, in the next phase of research, Russian experts will use mollusk nerve tissue to conduct experimental clinical treatments for volunteers suffering from Parkinson's disease. Medicinal Instructions Alias: Tiansnail, Liniu, Guaniu Source: Eulota similaris Ferussac, a large snail in the family Snailidae. The dried whole body or live individual is used as medicine. Catch them in summer and autumn, scald them with boiling water and dry them in the sun; if you use them fresh, catch them just before use. Meridian distribution of nature and flavor: salty, cold. A little poisonous. Functions and Indications: Clearing heat, detoxifying, and diuresis. It is used for carbuncle, swollen boils, hemorrhoids, and difficulty in urination. Usage and dosage: 0.0025 to 0.005 kg, grind into powder or take as pills and powder. For external use, grind an appropriate amount into powder or mash the fresh product and apply it on the affected area. Excerpt: "Compilation of National Chinese Herbal Medicine" Edible Value Snails are listed as one of the four famous dishes in the world along with shark's fin, scallops and abalone. They contain more than 20 kinds of amino acids and more than 10 kinds of trace elements and are rich in snail enzymes, SOD, etc. The protein content is respectively higher than Soft-shell turtle, pork, beef and eggs are 1, 10, 3 and 6 percentage points higher, while the fat content is only 1/18.1/272.1/92 and 1/70 of that of soft-shell turtle, pork, beef and eggs; per gram of snails Meat contains 0.45 μg of selenium, which is 4.5 times that of tea. From the perspective of market capacity, because snail food conforms to the new trend of naturalization, game, nutrition, and health care, the domestic and foreign markets are vast. The current annual demand for snail products in the international market is about 400,000 tons, and the United States alone needs to import 3 billion tons a year. Dollar snail. The market price is also very high. The ex-factory price of snail frozen meat in New York is equivalent to RMB 362.39/kg. A plate of 6 snails costs as much as US$18. The price of fresh snails in France, Spain and other places is equivalent to RMB per kilogram. 116.11 yuan. The price we have signed for exporting canned white jade snails has also reached US$9,000 to US$14,000 per ton. White jade snails are a new variety mass-selected in my country. They have tender, white meat and large individuals. They will have stronger competitiveness in the international market. In recent years, China has developed new products such as health food series, biochemical medicine series, compound nutritional beverage series, cosmetics series, canned wild game, frozen meat series, etc. with snails as the main raw materials. There are several products for treating tracheitis and prostate. Snail medicines for diseases such as inflammation will be mass-produced. Natural nutritional cream can also be refined and processed from snail secretion. Snail Snail is a terrestrial mollusk with high edible, medicinal and health care value. Its edible and medicinal history has been more than 2,000 years ago. Abroad, snails are one of the seven popular game species in the world, ranking first among the four famous international dishes (snails, abalone, scallops, and shark's fin). In France, it is known as the "French delicacy". During Christmas in European and American countries, it is almost impossible to miss snails without snails. In recent years, a craze for eating snails has quietly emerged in China's open coastal cities. During holidays, snails are sold out in the market. Comrade Deng Xiaoping once tasted snail dishes during his lifetime. He praised: "Snail dishes have filled a gap in the country and must be developed well." Snails enjoy the reputation of "soft gold" internationally. Its meat is tender, delicious and nutritious. According to measurements, every 500 grams of snail meat contains 90 grams of protein and various nutrients needed by the human body such as amino acids, vitamins, calcium, iron, copper, phosphorus, etc. It is a high-protein, low-fat food. Snails are cold in nature and salty in taste. It has the functions of clearing heat, reducing swelling, detoxifying, diuresis, relieving asthma, softening and hardening. It has certain curative effects on diabetes, cough, pharyngitis, mumps, tuberculosis, sores, hemorrhoids, centipede bites and other diseases. Therefore, it is praised by gourmets as a delicious delicacy and a good health product. Nutritional analysis: The protein content is higher than that of beef, sheep, and pork, but the fat is much lower than them. It also contains various minerals and vitamins. It is the first choice for dietary therapy for those with weak constitution, malnutrition and long-term illness. The enzymes contained in it can dissolve accumulation and remove stagnation, while glutamic acid and aspartic acid can enhance the vitality of human brain cells. Scientists believe that eating more snails can have nutritional and beautifying effects on skin and hair.