Skeletal System I H.W.doc - Skeletal System I. Review...

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Skeletal System I. Review QuestionsA.Introduction Bone Development & Growth1.Define the following and give examples:hyaline cartilage: found primarily on the ends of ribs, translucent material.• found on articular surfaces of bones• least differentiated variety and precursor of replacement bone.• translucent• little remains after replacement bone has ceased.Found in: tetrapod and fishes; jointsTransform into fibrocartilage, elastic cartilage, or calcified cartilage.calcified cartilage: vertebrae of cartilaginous fish.• formed when calcium salts are deposited within the interstitial substance ifhyaline cartilage or fibrocartilage.• often mistaken for bone.Found in shark; jawsendochondral:Formed in cartilage of the embryonic endoskeleton.Steps in endochondral bone growth: a .hyaline cartilage model,b. appearance of the bone collar;c.calcification of the diaphysis followed by the invasion of blood vessels, d. ossification, d,e,f –appearance of secondary centers of ossification, g. at maturaty metaphysis or epiphyseal plateis the area of cartilage growthmembrane bone: a deposited directly within a membranous blastema withouthaving been preceded by cartilaginous model.• intramembranous ossification gives rise to bones that forms on dermis: lowerjaw, skull, pectoral girdles, dentin.• may be compact, spongy, lamellar or non-lamellar. Example: dermal bone,periosteal bone. Found in vertebrae bones.heterotopic bone: • miscellanous bones that develop bu endochondral orintramembranous ossification in areas subject to continual stress in amniotes.(Usually missing from routinely prepared skeletons), present in upper eyelid ofcrocodilians, in syrinx of birds, gular pouch of lizard, muscular diaphragm ofcamel, in rostral bone on snout of swine.compact bone: dense peripheral bone tissue. A layered bone.spongy/ cancellous bone: sponge like tissue that lies at the interior part of the

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Term
Spring
Professor
RitaColon-Urban

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