Classification and characteristics of animals

We need to classify animals in the process of studying animals, which is biological taxonomy.

Tigers belong to the animal kingdom-chordates-mammals-carnivores-cats-leopards-tigers (species).

Between the seven basic taxonomic levels of Cladocera, such as family, genus and species (there should be a domain above the boundary), there is also a sub-X, for example, there is a pig-shaped suborder below Artiodactyla, and the Siberian tiger is a subspecies of tiger.

It should be noted that although a relatively complete biological classification scheme has been put forward, there are still a lot of disputes in academic circles, such as whether algae should be classified as protozoa or plants, whether giant pandas should be classified as Xiong Ke or autotrophs, whether chimpanzees belong to the same family as humans, and so on.

Traditionally, biology has been divided into five areas:

Protozoa, fungi, plants and animal kingdoms.

Next, we are going to talk about the animal kingdom.

There are 38 phyla in the animal kingdom, most of which are unfamiliar to us. Next, I will list these 38 doors one by one. For the more "profound", I don't know much, and there is nothing to say. I'll explain it in a sentence or two, and then introduce the "door" you are interested in in in detail. As for possible academic mistakes, as I am not a professional, please forgive me biologists.

In the animal kingdom, ***38 phyla are as follows:

1 Protozoa are all single-celled animals and are the most primitive animals, among which we are familiar with euglena and paramecium.

Metazoa are simple internal parasites with few recorded species.

Porphyra is also known as the phylum spongiosa. Sponges are primitive multicellular animals.

Up to now, Platycladus orientalis has been monopolized by an animal, filariasis ~ ~, and it has to be rejected ~ ~

As the name implies, archaism means that these animals are extinct, and "cups" mean that they look like cups.

6 coelenterates here are hydra, jellyfish, anemones and corals. Are you familiar with them? Not much to say.

Ctenomedusae is also classified as coelenterata.

There are worms, trematodes, tapeworms and other parasites that we often hear about.

9 marine benthos of Tabanidae, with cylindrical or long saclike bodies.

10 tongue worms are all "blood-sucking" parasites, and their taxonomic status is still difficult to determine.

1 1 odontoid 1994 a newly discovered animal, about which human beings know little.

12 A similar animal with a slightly higher phylum than a flat animal.

13 Gastropoda is very small, living in fine sand in shallow water, and people don't know much about it.

14 Nematoda is a huge family, and there are many ascaris in people's stomachs.

15 Gastropoda is an animal with cilia on its ventral surface.

16 rotifer phylum is very small, similar to protozoa.

17 linear phylum is a kind of nematode-like animal.

18 branchlets are marine benthos living in cold water near the poles, and there are very few recorded species.

19 Hydroptera is similar to the branchioptera.

Echinocephalus is an animal with a kiss on the front of its body.

2 1 armored animal door 1983, a new door, has not been accurately classified yet.

Small animals with moss on the inner anus.

23 Arthropods Earthworms, leeches, Nereis ... all have chain-shaped bodies. Needless to say?

Starfish is similar to the above-mentioned insect-eating animals.

Mollusks contain a large number of common animals, which I will explain in detail later.

Leptospira is extinct.

Tardigrada is a very strong animal, which can endure high temperature, absolute zero, high radiation vacuum and high pressure.

Clawed animals are worms, with cylindrical feet and claws at the end, which are almost extinct.

Arthropods account for more than two-thirds of the species in the animal kingdom, and this huge family will be introduced below.

30 brachiopods Sometimes you will see some shell-like fossils in street stalls, which were left by this animal.

3 1 The external anus used to belong to the same door as the internal anus, which is called bryophyte, but now it has been separated.

32. Another phylum of Lepidoptera is that there are only 10 species of animals, all of which are marine benthos.

Archaea was extinct in the Big Bang 530 million years ago, and it was only discovered in recent years.

Echinoderm is a familiar animal, including starfish, sea urchins, sea cucumbers and sea lilies.

A non-parasitic animal of Brachionus, which has no mouth and digestive tube, lives in the deep sea, and its taxonomic status is controversial.

There are only about 50 species of Chaetognathus, which are still marine animals.

Hemichordates have a worm-like body, and some people classify them as chordates.