Term
| functions of the skeletal system |
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Definition
| support, storage of minerals, blood cell production, protection, leverage |
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Term
| 98% of what is deposited in bone? |
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Definition
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Definition
| collagen fibers (flexibility) and hydroxyapatite crystals |
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Term
| 1/3 of matrix weight is ___ |
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Definition
| collagen fibers (tough and flexible) |
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Term
| 2/3 weight of matrix is ___ |
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Definition
| hydroxyapatite crystals (strong but inflexible) |
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Term
| 2% of total bone tissue volume __ |
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Definition
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| mature bone cells, surrounded by hard bone matrix, maintain protein and mineral content of matrix; found in lacunae |
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| osteocytes interconnected by ___ |
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| immature bone forming cless; develope into ostecytes; syntesize osteoid; produces new bone |
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| secrete organic components of matrix calcifies to form hard matrix |
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Definition
| mesenchymal cells-stem cell; produce osteoblasts; role in fracture repair |
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Definition
| large multi-nucleated cells; dissolve bony matrix (osteolysis); regulate calcium and phosphate concentrations in body fluids |
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Definition
| osteoclasts dissolving bony matrix |
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Definition
| basic functional unit of compact bone |
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Definition
| arranged in concentric layers around central canals which contain vessels in the compact bone |
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Definition
| connect central canals in compact bone |
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Definition
| cylindrical and parallel to long axis of bone (in compact bone) |
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| spongy bone is arranged in plated or struts called ___ |
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Definition
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Definition
| has no osteons and has an open network |
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| etween diaphysis and epiphysis of long bone |
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Definition
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Definition
| layer covering bone; isolates and protects bone; highly vascular and contains numerous nerves; |
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Definition
| cellular layer, fibrous layer |
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Definition
| layer lining marrow cavity; 1 cell thick, contains osteoprogenitor cells; incomplete layer |
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Definition
| disposition of calcuim salts in tissue |
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Definition
| replacing tissue with bone (intramembraneou,endochondral) |
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Definition
| where ossification begins |
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Definition
| develops from mesenchymal tissue |
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Definition
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Term
| intramembranous ossification bone formation |
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Definition
| CT > to bone; develops from mesenchyme CT; osteoblasts>osteocytes; osteoblasts secrete matrix; mineralization of calcium salts |
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Term
| endochondral ossification |
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Definition
| mesenchyme > hyaline cartilage > bone; chrondrocytes > osteoblasts; perichrondrium becomes periosteum |
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Term
| primary ossification centers stop at ___ |
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Definition
| metaphysis or epiphyseal cartilage/plate |
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Term
| growth form of primary ossification centers |
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Definition
| metaphysis (gives length of bone) |
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Term
| secondary ossification centers in ____ of bone |
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Definition
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Term
| epiphyseal cartilage/plate is between ____ and_____ |
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Definition
| epiphysis and diaphysis= metaphysis |
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Term
| what are laid down at secondary ossification center? |
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Definition
| chrondrocytes > osteoblasts |
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| width of bone; becomes compact bone |
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| example of pneumatized bone |
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Definition
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| example of irregular bone |
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Definition
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| elevations and projections |
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Definition
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| processes formed where tendons or ligaments attach |
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Definition
| trochanter, tuberosity, tubercle, crest, line, spine |
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Term
| processes formed for articulation with adjacent bones |
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Definition
| head, neck, condyle,trochlea, facet |
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Definition
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| foramen, fissure, meatus or canal, sinus or antrum |
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| coronal, sagittal, lambdoid, squamous, frontonasal |
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