Are sponges living creatures and what kind of creatures are sponges

Sponges are animals, including invertebrates and foraminifera. It is different from the sponges we use in our daily lives. Most of the sponges we use are man-made synthetic fibers.

And only a very small number of wealthy people can afford a real sponge, which is the carcass of a sponge, and its softness is incomparable to that of artificial sponges.

Sponges are the most primitive multicellular animals, with neither a head, nor a tail, a torso, and limbs, but also no nerves and organs, and the main components of sponge cells are calcium carbonate or silicon carbonate, as well as a large amount of collagen. Although the sponge is an animal, it cannot walk independently, but can only attach to the reef on the bottom of the sea, and filter the fine gravel and bacteria in the water from the seawater that flows around it to feed, and decompose the oxygen and scattered organic matter in it. <

Sponges are the most primitive multicellular animals, with neither a head shed, nor a tail, trunk and limbs, nor nerves and organs, and the main components of sponge cells are calcium carbonate or silicon carbonate, as well as a large amount of collagen. Although sponges are animals, they cannot walk independently, but can only attach themselves to the reefs on the bottom of the sea, and filter the fine gravel and bacteria in the water from the flowing water to feed, and decompose the oxygen and organic matter in the water.

Sponges are the most primitive multicellular animals that have lived in the ocean 600 million years ago. In addition, it is also the world's most structurally simple multicellular animal. There is no head, no tail, no trunk, no limbs, no nerves and no organs.

The main components of sponge cells are calcium carbonate or silicon carbonate and collagen with a large lead dose. At present, it has grown to more than 10,000 species, accounting for 1 15 species of marine animals, and is a large "family".

The shapes of sponges are varied, including flakes, blocks, sphericals, fans, tubes, bottles, pots, and branches. And the size of the sponge is varied, the small one is only a few grams, the large one is 45 kilograms, and the largest sponge span is meters long. In waters with strong currents, the height of the sponge is generally less than a centimeter, and the surface of the sponge forms many streamlined lines, which can avoid being broken by waves and currents.

Although sponges are animals, they cannot walk on their own, but can only attach themselves to the reefs on the bottom of the sea and obtain food from the seawater that flows around them. Most sponges live on the substrate of hard rock. And the sponge has no mouth, no digestive cavity, and no central nervous system, and is the most primitive animal.

However, there are many flagella and a sieve-like ring growing in the small holes that cover the body, which can be collected into the seawater with the swing of the whip, bringing in oxygen, bacteria, microalgae, and other organic detritus, which are then filtered through the ring, and finally become the nourishment for the sponge to survive. Therefore, sponges always live on the bottom of the ocean with ocean currents passing through, and in the course of millions of years of evolution, they have perfected a set of skills to use the flow energy of natural fluids, thus saving the chemical energy of food.

Sponges are a collective term for a group of porous filter-feeding organisms that originated in the Cambrian period 100 million years ago, of which 390 genera have been confirmed to have originated from the Cretaceous period (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 and 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, derived from carotenoids, mainly yellow to red.

Morphological characteristics:

Sponges are the simplest multicellular animals in the world. There is no head, no tail, no trunk, no limbs, no nerves and no organs. The main components of sponge cells are calcium carbonate or silicon carbonate and a large amount of collagen.

In waters with strong currents, the height of the sponge is generally less than a centimeter, and the surface of the sponge forms many streamlined lines, which can avoid being broken by waves and currents. Some sponges like to burrow, burrowing holes in the shells of abalone and oysters, and then settling on their shells. Sponges come in a variety of sizes, from small ones of just a few grams to large ones of up to 45 kilograms, and the largest sponges span meters long.

The colors of the sponge are equally colorful.