Term
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Definition
| ectodermal and mesodermal cells; osteoblast cells that make extracellular matrix of mucopolysaccharides and collagen; matrix mineralized w/ addition of calcium phosphate (apatite) |
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Term
| original functions for bone |
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Definition
| phosphate/calcium reserve; protection/insulation of electrosensory organs; all materials present in chordate stock, assembled in new way; protection of whole body, some earlies verts bony exoskeleton |
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Term
| bony internal skeleton developed when |
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Definition
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Term
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Definition
| originally cartilage, how our internal skeleton start out |
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Term
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Definition
| invaded by blood vessels, cartilage (polysaccharide gel) broken down and replaced by osteoblasts and bone |
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Term
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Definition
| rather than dermal bone thats remnant of exoskeleton |
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