Answer:
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Step-by-step explanation:
Sponges are sessile, which means they are affixed to a substrate and do not move. By filter-feeding, which entails pulling water into small holes on their surface called ostia and pushing it out through bigger apertures called oscula, they obtain their food. The water is then filtered via a system of tiny chambers and tubes lined with choanocyte cells, which have flagella that beat to produce a current.
Small particles like plankton, bacteria, and dissolved nutrients are caught and absorbed by the choanocytes as the water passes through the sponge, where they are digested. After that, the nutrients are dispersed throughout the sponge through diffusion, which is the transfer of molecules from a high-concentration location to a low-concentration area, and by water circulation inside the sponge.
Through water diffusion and circulation, which transports the broken-down food particles to all areas of the sponge, all of the sponge cells receive their nutrition. The nutrients from the moving water may be immediately absorbed by the cells lining the canals and chambers. However, diffusion is how the cells in the sponge's deeper layers obtain their nourishment. Because of the efficient circulation of water and nutrients throughout the sponge, sponges are frequently found in places with strong water flow.