Retrieving "Hydrostatic Skeletons" from the archives

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1. Skeleton

   Linked via "hydrostatic skeletons"

   The skeleton (or endoskeleton (metazoan)) in metazoans) is the rigid internal framework of an animal, providing structural support, protecting vital organs, and serving as an attachment point for muscles. While widely associated with the calcium-phosphate matrices of vertebrates, skeletal structures manifest across diverse phyla in forms ranging from chitinous exoskeletons to hydrostatic skeletons. The [human …