Term
| Bones: Classifications (5) |
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Definition
Long Bones: long w/. extended ends Short: Cubelike (wrist) Flat: Platelike; skull bones Irregular: Various shapes; vertebrae Sesamoid: Round; kneecap |
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Term
Long Bone Components : Epiphysis |
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Definition
Epiphysis: Expanded end of bone; often conevered w/ hyaline cartilage
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Term
| Long Bone Components: Diaphysis |
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Definition
Diaphysis: main shaft of bone |
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Term
| Long Bone Components: Periosteum |
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Definition
Periosteum: Out covering of bone; fibrous tissue; vascular. Functions in tendon attachment and bone formation/repair (deposition and reabsorption) |
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Term
| Long Bone Components: Processes |
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Definition
| Processes: sites of attachment, blood vessle routing, or articulation areas. |
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Term
| Long Bone Components: Compact Bone |
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Definition
| Also called cortical bone; continuous ECM (no gaps); lines diaphysis within periosteum. |
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Term
| Long Bone Components: Spongy Bone |
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Definition
Also called 'cancellous' bone; found in epiphysis Consists of branching plates of bone called trabeculae. Structure reduces weight. |
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Term
| Long Bone Components: Medullary cavity |
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Definition
Hollow chamber w/in diaphysis Spongy interior lined w// endosteum, filled w/ marrow, soft connective tissue. |
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Term
| Long Bone Components: Osteocytes |
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Definition
| Found in tiny lacunae chambers, which form concentrically around Haversian Canals. |
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Term
| Long Bone Components (Microscopic): Osteons |
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Definition
Fundamental units of compact bone, also known as Haversion system. Concentric units oreinted with direction of diaphysis around Haversian canals - which supply blood vessles and nerves. Osteocytes w/in osteons connected to eachother's cytoplasm through canaliculi. Osteons resist compressional forces. [image] [image] |
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Term
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Definition
| "Bones remodel according to forces" |
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Term
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Definition
| Collages gives bones strength and resillance; mineral slats provide hardness. |
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Term
Bone Composition Matrix Aging Changes Embryonic Structure
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Definition
Bone matrix around osteocytes composed of collagen and inorganic minerals: Calcium Phosphate and Calcium Carbonate. Calcium Phospahte is bulk of bone mineral. Aging: Collagen/mineral ratio changes as we get older; bones lose collagen and become more rigid. Embryonic tissue is connective-tissue sheets called mesenchyme.
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