The role of animals in people s lives is just a blank questionnaire that is urgently needed

Protect beneficial animals.

Dragonflies: can catch mosquitoes in flight, feed on the larvae of mosquitoes, and specialize in preying on various small moths, rice planthoppers, flies, mosquitoes and other insects. A dragonfly can eat 20 flies or more than 800 mosquitoes an hour, and everyone praises it as a pest control pilot.

Woodpecker: Eats forest pests, pests under the bark, can peck with a long and narrow beak, a woodpecker can protect more than 30 hectares of wood. People call it "The Forest Doctor".

Bees: Pollen can be used to increase the yield of many crops, collect honey and make honey, and make nutritional supplements.

Cuckoo: The cuckoo loves to eat caterpillars, is good for trees, and is a well-known forest helper.

Praying mantis: specializes in killing locusts, planthoppers, moths and other pests, and is known as the "big knife general" among insects.

Spiders: They can build webs and use them to stick to flies, mosquitoes and other pests, and can use them to protect farmland.

Swallow: It's not only an expert in flying, but also an expert in extermination. A nest of swallows can kill millions of insects in a summer, most of which are pests. It can remove insects from 200-400 acres of corn fields for humans in a year.

Owls: An owl can catch up to 1,000 voles in a summer.

Bats: Eat a lot of mosquitoes, moths and other pests. Manure can also be used as fertilizer.

Earthworms: live in moist, loose soil and feed on humus in the soil. Earthworms can improve the soil, increase fertility, and benefit the growth of crops.

If you ask earthworms to clean up the garbage, they can eat 20 tons of garbage, and the manure that earthworms excrete after eating the garbage is a high-quality natural fertilizer, so it can also make 20 tons of high-quality fertilizer.

It's just food, clothing, housing and transportation...

There are a lot of animals, so I don't know how to ask questions. Let's divide it into categories, be specific. After all, their world will not be smaller (there is a lot of variety) than our humans!

1. Nutritional value of livestock and poultry.

Second, the nutritional value of eggs.

3. Nutritional value of aquatic products.

4. Nutritional value of milk and its products.

5. Nutritional characteristics of animal foods Survey results:

1. Nutritional value of livestock and poultry products.

Meat is rich in fat, protein, minerals and vitamins, with fewer carbohydrates than plant-based foods and no plant fiber.

The composition of meat varies not only according to the relative amount of fat and lean meat, but also according to the type of animal, age, fattening degree and the part taken.

2. Nutritional value of egg products.

Common eggs include eggs, duck eggs, goose eggs, etc., and the nutritional content of various poultry eggs is about the same. The protein content in egg whites is 11 13 and the moisture content is 85 89; Egg yolk contains only 50% water, and most of the rest is protein and fat, with a ratio of 1:2.

In addition, eggs contain carbohydrates, minerals, vitamins, coloring, etc.

3. Nutritional value of animal aquatic products.

Aquatic products include a variety of fish, shrimp, crabs, shellfish, and seaweed (kelp, seaweed), among which fish is the most common. The nutrient composition of fish varies depending on the species, age, size, fatness, fishing season, production area, and sampling site.

In general, protein is the main component in fish solids; The fat content is low, but there are more unsaturated fatty acids in it; Fish meat also contains vitamins, minerals and other components, especially seafood saltwater fish contains a certain amount of iodized salt and potassium salt. It is of great significance to human health.

4. The nutritional value of milk and its products.

Milk is a nutritious, easy to digest and absorb, high-value food, not only contains protein and fat, but also contains lactose, vitamins and inorganic salts. Fresh milk generally contains water 87 89, protein 3 4, fat 3 5, lactose 4 5, minerals 0 6 0 78, and a small amount of vitamins.

Milk is the most commonly consumed milk by humans, compared with human milk, milk contains more protein, and contains less lactose than human milk, so when replacing breast milk with milk, it should be appropriately blended to make its chemical composition close to that of breast milk.

5. Meat, poultry, fish, eggs and milk are all animal foods, from the perspective of nutrition, they are not only rich in protein, fat, inorganic salts and vitamins, but also high quality protein, which is a high-quality protein. Meat, poultry, fish, eggs, milk and other foods mainly have the following characteristics in terms of nutrition.

1. The quality of protein is high and good.

2 High levels of saturated fatty acids and cholesterol.

3 Low in carbohydrates.

4. The content of inorganic salts is relatively complete.

5 Rich in vitamins Analysis and Recommendations:

Human life is closely related to animals, and animals have a lot of help for us humans (diet, medicine, etc.) Our lives are inseparable from them Animals are friends of human beings, we should protect animals, and we can't kill them casually Think about it, if animals disappear from the earth, then how will we humans live? Therefore, we must rationally develop and utilize animal systems.