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17 Cards in this Set
- Front
- Back
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Components of ECM in Bone |
40% dry weight Organic materials mainly collagen type I fibres Inorganic salts calcium and phosphate |
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periosteum content and location |
External layer of bone forming cells (location) Consists of collagen bundles (periosteal fibres called peforating fibres or sharpey's fibres) Fibroblasts Innermost layer contains mesnchymal osteoproginator cells |
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Contents of endosteum |
Osteoprogenitor cells and osteoblasts |
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Bone Composition of bulbous ends called epiphyses |
Composed of spongy bone covered by a thin layer of compact bone |
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Bone composition of diaphysis |
Composed of compact bone with a thin component of spongy bone on its inner surface around bone marrow |
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Bone composition of short bone |
A core of spongy bone surrounded completely by c9mpact bone |
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Bone composition bone that forms skull cape |
Two layers of compact bone called plates (tables) separated by a thicker layer of spongy bone |
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The two types of bone gross examination shows |
Compact bone Spongy/trabecular/ cancelous bone |
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Microscopic classification of Bone |
Woven bone (primary bone) Lamellar bone (secondary bone) |
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Woven bone structure characterized by? |
Random disposition of fine collagen fibres and lower m8neral content |
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Location or cases were woven bone can be found |
Found in embryonic development and fracture repair Near sutures of the calvaria (skull cap) in tooth sockets and some tendon insertions |
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Why woven bone is found in a few places |
it is Usually Temporary and is replaced by lamellar Bone |
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Organization of collagen fibres in lamellar bone |
Parrallel to each other or concentrially around a vascular canal |
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Description of haversian system |
Complex of concentric lamellar surrounding a small canal CONTAINING blood vessels, nerves and loos CT |
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Another name for harversian system |
OSTEON |
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Outer boundary of an osteon, more rich ollagen layer |
Cement line |
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Volkmann canals function |
Enable communication central canals to communicate with the marrow çavity, periosteum and other central canals |
