: Many, such as arthropods, rely on a hard exoskeleton for protection and movement, while others use hydrostatic skeletons (fluid-filled cavities) . Master Adaptations and Recent Discoveries
Made of calcium-rich plates called ossicles. Located just beneath the skin. invertebrate zoology lecture notes ppt new
: Richard C. Brusca's Invertebrates textbook is a seminal work that frames its discussion around the "Bauplan" concept, or the structural and functional design of each phylum. : Many, such as arthropods, rely on a