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This Concept Map, created with IHMC CmapTools, has information related to: Sponges, Gemmules are specialized Buds, Sponges live in Water, Sponges are Hollow, Sexually producing Larva, Sponges have no Organs, Water mostly Salt Water, All Nutrients including Smaller Living Things, Sponges have no Nervous System, Sponges are the most primitive of Multicelular organisms, Asexually through Regeneration, Sponges reproduce Asexually, Spicules are Small Spikes, Spicules may be Calcium Carbonate, Collar Cells or Choanocytes Are Found Inside Cylinders, Sponges have Skeletons, Sponges are Sessile, Sponges have Osculum, Osculum expels Water, Hermaphroditic means Has Both Sexes, Osculum is an Opening