Assertion: freshwater sponge | /r/CapableOf | survive harsh conditions
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text: a specialized stinging cell found in Cnidaria epidermis the layer of cells that lines the outer surface of an animal extracellular digestion a form of digestion, the breakdown of food, which occurs outside of cells with the aid of enzymes released by cells fragmentation a form of asexual reproduction in which a portion of the body of an organism breaks off and develops into a living independent organism; found in plants, sponges, and some other invertebrates gastrodermis the layer of cells that lines the gastrovascular cavity of cnidarians gastrovascular cavity the central cavity bounded by the gastrodermis in cnidarians gemmule a structure produced by asexual reproduction in freshwater sponges that is able to survive harsh conditions intracellular digestion the digestion of matter brought into a cell by phagocytosis medusa a free-floating cnidarian body plan with a mouth on the underside and tentacles hanging down from a bell mesoglea the non-living, gel-like matrix present in between ectoderm and endoderm in cnidarians mesohyl the collagen-like gel containing suspended cells that perform various functions in sponges monoecious having both sexes in one body, hermaphroditic nematocyst the harpoon-like organelle within a cnidocyte with a pointed projectile and poison to stun and entangle prey osculum the large opening in a sponge body through which water leaves polyp the stalk-like, sessile life form of a cnidarians with mouth and tentacles facing upward, usually sessile but may be able to glide along a surface Porifera a phylum of animals with no true tissues, but a porous body with a rudimentary endoskeleton spicule a short sliver or spike-like structure, in sponges, they are formed of silicon dioxide, calcium carbonate, or protein, and are found in the mesohyl spongocoel the central cavity within the body of some sponges