Is a sponge an animal, is a sponge an animal?

The sponge is a phylum of porous animals in invertebrates, and it has several main characteristics, first, it has no cell wall; Second, most sponges are still ovoviviparous, which is very consistent with these characteristics of animals. Because the body is soft like cotton, and it lives in the sea, it gets its name.

Not the same. Sponges are a collective term for a group of porous filter-feeding organisms that originated in the Cambrian period 100 million years ago.

Of these, 390 genera have been confirmed to be of Cretaceous origin.

100 million years ago). There are about 5,000 species in the phylum > sponges, divided into 790 genera and 80 families, with a worldwide distribution, ranging from freshwater to marine, from intertidal to deep-sea. They vary in shape, in the form of lumps, tubes, forks, umbrellas, cups, fans, or amorphous shapes, ranging in size from extremely small to 2 meters long, often forming a thin covering layer on the substrate to which they are attached. They can be single or brilliant in color, which is derived from carotenoids.

Predominantly yellow to red.

Sponges are animals.

The sponge is a very primitive animal that belongs to the phylum Porous Animals in the invertebrates. Because the body is soft like cotton, and it lives in the sea, it gets its name.

Sponges have lived in the ocean for 200 million years and have more than 10,000 species. The shapes of sponges are varied, including flakes, blocks, sphericals, fans, tubes, bottles, pots, and branches.

The whole body is composed of two layers of cells from the inside to the outside, and there are as many as 400 billion small pores on the body surface that communicate with the body cavity. The flagella that grow in the small pores throughout the body are inhaled into the seawater, and the oxygen, organic matter, algae, and other substances in the seawater are filtered through the sponge body, and then absorbed as nutrients for life.

Sub-classification of sponges

Sponges are mostly in groups and have few monomers. Sponge is a general term for organisms in the phylum Polypozoa, including four outlines: common sponge, glass sponge, calcareous sponge, and hard sponge.

Sponges have supportive needle-like bones in their body walls. According to the nature of bone needles, they can be divided into two categories: calcareous sponges and non-calcium sponges.

The two layers of cells that make up the body wall of sponges are composed of grooves with different degrees of complexity in different species, and the body structure of sponges can be divided into three types: single groove, double groove and double groove.

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Problem description: What kind of sponge is it?

Analysis: Sponges belong to the phylum Pores, which are the most primitive and lowest-grade multicellular animals, most of which live in the ocean. It has a simple structure, no mouth, no digestive cavity and no moving organs.

It is a group of single-celled animals in transition to multicellular animals, which shows an important process of animal development from lower to higher levels. The sponges are varied and colorful, including the white branch sponge of the flat tubular group, the bottle sponge of the cylindrical monomer, and the loquat sponge with a realistic image.

Although sponges have a variety of morphologies, they can be classified into two categories: mound and chimney. The sponges that live in the environment of large waves and rapids are mostly streamlined mound-shaped; The sponge that lives in a calm environment resembles an erected chimney.

Sponges are animals and belong to invertebrates and also belong to porous animals. It is different from the sponges we use in our daily lives. Most of the sponges we use are synthetic synthetic synthetic chemical fibers.

And only a very small number of wealthy people can afford to use the sponge of the real ocean, which is the corpse of a sponge animal, and its softness cannot be compared to that of a synthetic sponge.