BIOL-K - Biology BIOL-K 103 Lecture Notes - Lecture 11: Hydrostatic Skeleton, Gastrovascular Cavity, Muscular Hydrostat
27 Apr 2016
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Movement skeletal muscles attach to bone: 4. 10: storage of energy sources lipids. Exoskeletons: defined: secreted by and covers epithelium, composition: calcium carbonate or chitin, found in invertebrates, cnidarians: anthozoa (hard corals, mollusks: shell, anthropods, cuticle containing chitin, thin, flexible joints, must molt (ecdysis) (ecdysozoa) Endoskeletons: defined: covered by another tissue, examples, proiferans: spicules in mesophyll, echinoderms, calcified spines and plates beneath epidermis, vertebrates, bone. Vertebrate endoskeleton: mainly bone (ossified, chondrichthyes cartilage, tetrapod skeleton (birds, amphibians, reptiles, mammals, axial skeleton central axis, appendicular skeleton limb bones and connections, divisions pectoral (shoulder) girdle, pelvic (hip) girdle. Dense vs. spongy bone: dense, structure: osteon system, compact bone, outer hard bone, encloses spongy bone and marrow cavity, muscles attach to it. Spongy: location: surround by dense bone, ends of long bones, center of flat bones space filled with marrow, name also called trabecular bone, structure: trabeculae, function: all blood cells formed here.
