Yes: inter-cell connections basement membranes
No, except that Homoscleromorpha have basement membranes. Animals that get food this way are called filter feeders. Most sponges filter (take out) little bits of food from the water going through their bodies. The water goes out through a big tube in the center. All sponges take in water through pores (little holes) in their bodies. There are more than 10,000 species of sponge. Most of them feed on bacteria and other microorganisms. Their bodies are full of pores and channels allowing water to circulate through them. The basic body plan is a jelly-like layer sandwiched between two thin layers of cells. Nevertheless, sponges are quite successful. A sponge is an animal that grows in one spot like most plants do. It is sessile: it cannot move from place to place the way most other animals can. It is a simple animal with many cells, but no mouth, muscles, heart or brain.
For sponges used for washing, see Sponge (tool).Ī sponge is a member of the phylum Porifera.
0 kommentar(er)
