From the evolutionary history, all kinds of animals appeared earlier than humans, and humans are the highest stage of animal evolution. In this sense, there can be no human beings without animals. At the same time, after the apes evolved into humans, everything needed for human life was directly or indirectly related to animals. Without animals, human beings can't live well.

(1) Animals provide abundant material resources for human life.

Abundant animal resources are the material treasures endowed by nature to human beings. Today, there are still people who hunt animals for a living, such as the nomadic Gaochun people in southeastern Brazil. In many countries, animal resources are the mainstay of maintaining the national economy and people's livelihood. Australia has always been known as "a country riding on the back of sheep". Camels are called "ships in the desert" and have been an important source of food and clothing for Arabs for centuries.

With the development and progress of society, human beings are more and more picky about the choice of food. From our ancestors' greedy appetite for food, to plant food, now to animal food, from fatty meat to protein meat.

Animals in China come from protein, with pork as the main source in most areas and beef and mutton as the main source in some areas. In addition, the meat and eggs of poultry are also important sources of protein.

In animal protein, the proportion of fish is second only to the above meat. Fish is the best animal food in protein. At present, the global annual catch is 70-75 million tons, accounting for 1/5 of human consumption in protein.

Today, with the decrease of animal resources, the population is increasing. Humans need more animal resources. What should we do?

At present, marine fishing activities are mainly concentrated in offshore waters with a water depth of about 200 meters, accounting for 7% ~ 8% of marine waters. It is estimated that the ocean has reserved 1000 years of resources for all mankind. Therefore, it is an important way for human survival and development to develop the ocean and ask for food from it.

Recently, many people have proposed using insects as food sources. There are many kinds and quantities of insects with high nutritional value. China has a long history of eating insects, such as eating ant paste more than 3000 years ago. It is said that there was a serious locust plague in Shandong during the Tang Dynasty. Emperor Tang Ming personally visited the disaster area, helped farmers to eliminate locusts, burned a big oil pan, poured the captured locusts into the oil pan and fried them, and personally tasted the locusts in public. Since then, especially in the north, the wind of eating locusts has been blown by farmers to restaurants and halls, which has become delicious on the table. Later lice, osmanthus cicadas, silkworm chrysalis, ants, crickets, crickets and so on. Everyone was present at the party. Some people think that there are more than 3,500 species of insects for human consumption, and scientists predict that 2 1 century will be the century of insect food.

In addition to finding new food sources, human beings should also use modern science and technology to develop aquaculture, improve the productivity of livestock and provide more food for human beings. In addition, it can also expand the scope of breeding. For example, ostriches, which used to be wild, can now be domesticated after artificial domestication, and there is an upsurge of raising ostriches all over the world.

2) the relationship between human health and animals

It is people's wish to keep healthy, prevent diseases and delay aging. In the long-term practice, people have found that many diseases can be treated with various animals. For example, the ancients have long known that medical leeches can be used to suck blood and treat toxic sores. There are 46 1 species of animal medicines recorded in Li Shizhen's Compendium of Materia Medica in Ming Dynasty.

Traditional Chinese medicine in China has a long history, and many animal medicines are widely used, such as bezoar, velvet antler, musk and tortoise plastron. Bufo bufo gargarizans can be made into Venenum Bufonis, Hippocampus, Leech, Scolopendra, Eupolyphaga Seu Steleophaga, etc. It is also a valuable resource with medicinal value.

Niuhuang Jiedu Pill and Liushen Pill are famous Chinese patent medicines, and Niuhuang is the main component of these medicines. Do you know where bezoar comes from? It turns out that bezoar is a gallstone of cattle. Because the gallstones in cattle are yellow, they are called bezoar. Calculus bovis usually exists in the gallbladder of old cattle over 10, but the probability of gallstones in cattle is only a few thousandths. Because natural bezoar is very rare, the price of 1 g bezoar is several times higher than that of 1 g gold. However, scientists have been able to artificially produce bezoar in the gallbladder of cattle through surgery, and now the output of bezoar has greatly increased.

In the zoo, we have seen animals such as sika deer or red deer, and they often have horns of different shapes on their heads. They change their horns every year, and their growing antlers are covered with furry skin. We call it antlers. Pilose antler is a treasure, which can improve human vitality, promote metabolism, especially enhance brain function. All previous medical books called velvet antler "the best medicine". In addition, deer kidney, deer blood, deer bone, deer tail and deer whip can all be used as medicine, which is really a treasure of deer body. However, the number of wild sika deer is less than 1000, making it a national first-class protected animal. Therefore, the only way to produce more velvet and venison is to develop artificial deer breeding.

Musk deer is a deer. Musk is a substance secreted by musk glands of male musk deer, which is widely used in traditional Chinese medicine, such as "Liushen Pill", "Musk Busu Pill" and "Musk Paste". Musk is rich in fragrance, so it is also the raw material of high-grade perfumes and spices.

Bear bile is a precious Chinese herbal medicine, which has the functions of clearing liver and moistening lung, invigorating stomach and calming nerves, and detoxifying. In the past, black bears were hunted for courage, so the number of bears dropped sharply. In order to protect wild resources, in recent years, some provinces in China have established artificial bear farms, which can take bile from living animals.

Pangolin, also called carp, is a burrowing animal that lies in the daytime and goes out at night. It has a strong ability to make holes. First, it digs the soil with sharp claws on its forelimbs. When the cave is full of loose soil and needs to be carried, it erects the scales of the whole body and lets the soil fall into the gaps between the scales. Then, it leans back and pushes the soil out between the scales. This repetition is like a machine digging a hole through a mountain, hence the name "pangolin". It also has a unique skill: when it meets the strongest enemy, it rolls its body into a ball, exposing only hard scales, making it impossible for the strong enemy to speak. Pangolin feeds on termites and ants. When foraging, it first scratches its nest with its claws, and then puts its long tongue into the nest. Many termites stick to their tongues, just as glutinous rice balls sticks to sesame seeds, which makes it delicious in his mouth. The scales of pangolin are very good traditional Chinese medicine, which has the effects of dredging menstruation, promoting lactation, reducing swelling and relieving pain.

Don't think that the seahorse is a horse in the sea. Actually, it's a fish. Because its head looks like a horse, it is called a seahorse. It breeds in a strange way. Whenever the breeding season comes, the abdomen of the male hippocampus is congested and the skin folds heal to form bags under the eyes. The female seahorse lays mature eggs in the pouch of the male seahorse, and the eggs hatch into small seahorses. When the baby seahorse is mature, the male seahorse leans forward and backward like a tumbler, and strips of baby seahorses are gradually ejected from the pouch. Hippocampus can be used as medicine, and it is known as "southern horse and northern ginseng", which means that hippocampus is as famous as Jilin ginseng, and it has the effects of fitness, cardiotonic, analgesic and induced labor.

Wood frog is a kind of China wood frog in northeast China. The dried female Rana chensinensis is called Rana chensinensis as a whole, and the dried fallopian tube is called Rana chensinensis oil, which is a valuable tonic of traditional Chinese medicine and used to tonify deficiency and reduce fever. Because there is a great demand for Chinese medicine, artificial farming has been carried out in many places recently.

Scorpions are close relatives of spiders. Because it stings people, it is often hated and rejected by people. In fact, scorpions feed on insects, directly or indirectly killing many insects that harm human beings, and its role is greater than this. And scorpions can be used as traditional Chinese medicine, called scorpions, and the detoxified tail is called scorpion tip. It can treat infantile convulsion, adult hemiplegia and other diseases 10. Scorpion venom can also treat Japanese encephalitis.

Centipede is both a poison and a treasure. It has toxic chelates and glands, which will hurt people, but it is also one of the precious animal medicinal materials, with anti-tumor, antispasmodic and anticonvulsant effects.

Cancer is a chilling disease, and people talk about the discoloration of cancer. In order to weaken and prevent the threat of cancer to human beings, thousands of scientists are exploring around the clock in various fields, and marine drug resources are the focus of their research. Scientists have extracted many drugs from marine life. The extract of Meretrix meretrix has inhibitory effect on the growth of lung cancer cells. A substance extracted from sponges can be used for treating oral cancer and cervical cancer, as well as leukemia. Anti-cancer substances were also extracted from gorgonian and soft coral in the Caribbean. Scientists have found that sharks rarely get cancer and seem to have natural immunity to cancer. Injecting some germs and cancer cells into sharks can't make them sick and cause cancer. These findings have aroused people's interest in shark research. In recent years, a super anticancer drug was isolated from the secretion of hammerhead shark, squalene with anticancer effect was obtained from the liver of deep-sea shark, and antitumor active components were also found in shark cartilage. Scientists have also found many antiviral substances from oysters, clams, abalone, conch, squid and other animals, which can treat many diseases.

The crab shells and shrimp shells we usually eat are thrown away as garbage, but there is a substance in these shells called chitin, which is very useful to human beings. Chitin is widely found in the hard shells of insects and crustaceans and in the cell walls of fungi and algae. There are billions of tons of chitin biosynthesized in nature every year, which is one of the most abundant organic substances on the earth. At present, the development of chitin is booming in the world, and chitin has been applied in many fields. As far as medicine is concerned, chitin can be used as surgical suture, artificial skin, artificial blood vessel, wound dressing, hemostatic sponge, drug carrier and development of anticancer drugs. The humble chitin turns waste into treasure. Therefore, chitin from marine animals is also a valuable natural resource.

There are many kinds of marine animals, each with its own unique skills. There are more than 12000 species of marine animals known in China, and their countless drug resources will bring more gospel to mankind and create a better tomorrow.

It can be seen that many animals have made selfless contributions to human health for a long time and become loyal guardians of human health.

3) Animals provide rich and colorful clothing materials for human beings.

When people know more about animals, people find that some "products" of animals, such as fur and feathers, have great uses and can be used as raw materials to beautify life.

The dedication of silk-producing insects Silk has long been the raw material for people to make clothes. People will feel particularly comfortable and cool in silk clothes, and girls will look more beautiful and elegant in colorful silk clothes. Legend has it that as early as 4000 years ago, the working people in our country knew to grow mulberry and raise silkworms. During the Shang Dynasty, exquisite silk was woven. Since then, sericulture, silk reeling and silk weaving have become the traditional sideline and export industries in China. In the Western Han Dynasty, Zhang Qian went to the Western Regions and brought a lot of silk.

Tussah mainly grows in Liaoning, Shandong, Henan and other places, and its main food is oak, oak and oak leaves. Tussah's oval yellow-brown cocoon can be used for weaving, and its silk can also be used to make fishing nets, tire cores, steel wire sheaths, etc., which are widely used.

Ricinus communis was originally a wild silkworm living on Ricinus communis, which was domesticated artificially. Castor silkworm mainly eats castor leaves, but also cassava leaves or Ailanthus altissima leaves. Its cocoon is white with holes in it, so it can't be reeled. It can only be used as raw material for silk spinning, or blended with wool to make wool or serge clothing.

Wild silkworm, also known as camphor silkworm, is often raised by residents in Guangdong and Hainan Island. The wild silkworm feeds on camphor trees or maple leaves. Cocoon is brown, its silk quality is the best, and it is tough and durable, which can be used as fishing line and surgical line.

Silkworm, also known as Toona sinensis, feeds on leaves such as Ailanthus altissima and Ricinus communis. Its larvae are green and covered with white powder. Cocoon is taupe, and its silk is called Toona sinensis.

No matter silkworm, castor silkworm, tussah silkworm, wild silkworm and silkworm, they are all pests that harm some trees. But when people understand their habits and characteristics, they turn harm into profit and use their reeling to weave silk, serving human production and life. This tells us that human beings must protect wild animals first, in order to further study them and understand them, so as to better play their role.

Gorgeous fur makes a splendid and luxurious fur coat, a well-fitted leather jacket makes people energetic, colorful sweaters and trousers make people energetic, and wearing a woolen coat suit makes people more elegant.

China is rich in fur animal resources, with about 150 species distributed all over the country, among which mink, otter, fox and Yellow weasel are world-famous fur animals. It is estimated that China can produce 20 million to 30 million pieces of fur every year.

Because of its unique economic value, fur animals have been hunted by people for many years, and even become a means for a small number of people to make a living. The number of wild fur animals has dropped sharply, and some of them are on the verge of extinction. After learning from a painful experience, people rationally chose the road of artificial domestication of wild fur animals. Artificial breeding of fur animals, a new breeding industry, has been set off all over the world and has become the main source of fur. At the same time, human beings have also made laws to protect wild animals that have nowhere to hide, and hunting wild protected animals will be punished by law.

4) Animals are messengers of pollen.

In the ecosystem, green plants are "producers", making nutrients and providing habitats for various animals. However, plants can't live without animals. Plants can't reproduce well, and their viability will decline, which is in danger of death. It is estimated that about 84% of flowering plants are pollinated by insects.

Darwin wrote in his famous book "The Origin of Species": "If there were no insects growing on the surface of the earth, our plants would not be dotted with beautiful flowers, but just some monotonous flowers …" So what does the color of flowers have to do with insects?

It turns out that the bright colors of flowers are conducive to attracting insects, making it easy for insects to patronize in front of them, and realizing the transmission of pollen through the existence of insects, thus completing the hybridization of plants, which is conducive to the survival of plants. Under the action of natural selection, the color of the corolla is more and more bright, thus creating the most beautiful product of nature-colorful flowers.

Similarly, through the competition for survival, the fruit has become more and more beautiful. Because the more beautiful the fruit, the more likely it is to attract the attention of birds and animals. Birds and animals eat the fruit and inadvertently spread seeds for plants, so this plant has more opportunities to spread.

Different kinds of insects like different colors. For example, butterflies are sensitive to red and orange, bees like yellow, white and blue, and flies like green, brown and white.