BIOL 2001 Lecture Notes - Lecture 6: Pharyngeal Jaw, Axial Skeleton, Hyomandibula
23 Feb 2016
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Document Summary
Some vertebrates have exoskeletons (ex, armadillo) o o. Generally protective structure - doesn"t play a role in locomotion. Specialized - made of dermal bones or osteoderms. Form within dermis but can merge with endoskeleton. Primary functions are to provide stiffness, to bear loads, and in some cases aid in bone growth. Many forms of cartilage exist but all are formed of a poorly organized matrix of collagen, other protein filaments, and various small molecules that bind to water. Agnathans, chondricthyans, and some actinopterygians have a cartilengenous skeleton. In chondricthyans the cartilage may be mineralized to varying degrees with crystals of calcium phosphate hydroxypatite. Bone is a specialized connective tissue playing a structural role (protection and support) as well as a metabolic role (reserve of ca and mg) Most fish and tetrapods have a boney skeleton. Bone tissue has the capacity to adapt to functional environment by changing mass and geometry o.
