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Biology, 25.11.2021 06:00 pitmmaKaos5499
The outer layer of the sponge is covered by flattened cells that sometimes contract in response to potentially harmful stimuli to protect the inner cells of the sponge. One type of inner cells are , flagellated and collared cells that help circulate water through the sponge and collect food particles. Various types of cells are found in the mesohyl and may secrete structural components such as spicules or spongin fibers
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