What are the types of animals? What are the types of animals?

The extant animals known to humans are divided into two major types: invertebrates and vertebrates, according to the presence or absence of a vertebrate in the body.

1. Invertebrates are a relatively low group in the animal kingdom, but they are an incredibly diverse animal germline. Invertebrates far outnumber vertebrates, both in species and in numbers.

In the wide variety of animal kingdoms, invertebrate groups account for more than 90% of the proportion, including not only jellyfish, octopuses and other animals in the ocean, but also various insects, parasites also belong to invertebrates.

2. The most striking feature of vertebrates is that a vertebra or spine supports the body. A typical vertebrate has complex sensory organs that connect muscles, limbs, and a brain. The complex skeleton inside allows vertebrates to grow quite large and adaptable.

Vertebrates account for a very small proportion of the animal kingdom, and there are about 40,000 species of vertebrates known to man, which are divided into fishes, amphibians, reptiles, birds, and mammals. They are found in almost every corner of the planet.

1. Reptiles: evolved from the ancient amphibians at the end of the Carboniferous period, the heart has two atria and two ventricles, the ventricles have incomplete diaphragms, and the body temperature is not constant, which is truly adapted to terrestrial life of ectothermic vertebrates, and thus produces constant temperature birds and mammals. Reptiles are not only further adapted to terrestrial life in terms of adult structure, but also free from the constraints of water, and are called amniotes together with birds and mammals.

2. Birds: Birds feed on plant seeds, insects, voles or snakes, most of which are beneficial to humans. We need to protect the birds. Among them, there are migratory birds that are good at long-distance seasonal migration, and there are also resident birds that settle in small areas, which is a large group of animals in the animal kingdom.

Animals can be divided into aquatic animals, terrestrial animals, and flying animals according to their living environment.

There are other ways to classify animals, which can be classified as animals with or without vertebratesThere are vertebrae also included for mammals, fish, amphibians, reptiles, birds. Animals without vertebrae are generally divided into annelids, molluscs, and so on.

1. Aquatic animals:Dolphins, whales, octopuses. Sea lions, turtles, squid, anemones, sharks, crabs, shrimps, conchs, seahorses, sea cucumbers, lobsters, jellyfish, moray eels, sea snakes, hermit crabs, flounder, small grass carp, lionfish, pomfret, sea bass, shellfish.

2. Terrestrial animals:Cats, dogs, mice, chickens, ducks, wolves, lions, tigers, elephants, cows, snakes, rabbits, rhinoceros, sheep, elk, giraffes, foxes, lizards, hippos, ostriches, brown bears, bears, snails, insects, ladybugs, ants, butterflies, bees, geese, wild boars, earthworms.

3. Flying Animals:Eagles, sparrows, magpies, swallows, pigeons, egrets, seagulls, parrots, starlings, thrushes, quails. Flamingos, crows, macaws, cuckoos, peacocks, penguins, orioles, larks, owl nucleus, hummingbirds, cuckoos, mandarin ducks, swans, mallards, red-crowned cranes, woodpeckers, blue-footed cherry birds, red-billed blue magpies, jays, kingfishers, canaries.

Basically, that's all the more common, and that's probably all I can say, and there are a lot of others that are rare, and I can't think of them for a while. There are still some barbarian animals and insects that have not been spoken, and there are locusts and the like, which are not so clear, but there are a lot of animals, and there are many of your creatures that have not yet been spoken, for example, the next category can be divided into many species of sharks.

In nature we can see a lot of beautiful birds, and their color is very good-looking, now the environmental pollution is getting more and more serious, now many envy animals are getting less and less, are the country's first-class protected animals. We also need to protect the environment so that these animals can depend on the environment for their survival.

Scientists divide the extant animals known to humans into two major types: invertebrates and vertebrates, according to the presence or absence of a vertebrate in their bodies. Scientists have identified more than 46,900 species of vertebrates.

Including sharks, rays and other cartilaginous fish animals, carp, yellow croaker, grass carp and other bony fish animals, frogs, baby fish and other amphibians, snakes, lizards and other reptiles, chickens, pigeons, sparrows and other birds, monkeys, red pandas and other mammals.

Scientists have also discovered more than 130 or silver million species of invertebrates. Most of these animals are insects, and most of the insects are beetles. Sponges, earthworms, squid, oysters, red starfish, jellyfish, spiders, polyps, radiolaria, roundworms, pork tapeworms, sand silkworms, snails, slugs, etc., are all invertebrates.

Taxonomic characteristics: Due to the wide variety of animals, human beings still lack in-depth research and understanding of some taxa, therefore, until now, there is no relatively complete classification system for the classification of animals in the world.

The reason for the difference lies in the fact that some scholars have promoted the different classes of the group to the phylum, such as rotifers, abdominal hair, mustello, nematodes, nematodes and other classes in the protoprosthetic coelage, and some scholars have promoted them to phylums.

The characteristics are still the same: the differentiation of cells, the formation of the germ layer, the presence or absence of body cavities, the symmetrical form, the division of body segments, the nature of the bones, the characteristics of the appendages, and the occurrence and development of other organ systems, with reference to geological data on the division of strata. <>