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Sensing, secretion, protection, transcellular transport, and selective absorbtion
<span>Sponges have cellular-level organization, meaning that that their cells are specialized so that different cells perform different functions, but similar cells are not organized into tissues and bodies are a sort of loose aggregation of different kinds of cells. This is the simplest kind of cellular organization found among parazoans.
<em>I hope this helps!~</em><em /></span>
