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| connective tissue in which the matrix is hardened by the depostition of calcium phosphate and other minerals |
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| stem cells that develop from embryonic mesenchymal cells and give rise to most other bone cell types |
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| bone forming cells - roughly cuboidal and line up in a single layer on the bone surface under the endosteum and periosteum and resemble a cuboidal epithelium - nonmiotic |
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| former osteoblasts that have become trapped in the matreix trhey deposited - reside in lacunae which are interconnected by slender channels called canaliculi - resorb bone matrix and others deposit it - homeostatic maintenance of both bone density and blood concentrations of calcium and phosphate ions |
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| layers of matric concentrically arranged around a central canal |
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| connection between osteocytes through osteon |
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| basic structural unit of compact bone |
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| connections between central canals along the length or side of the osteons - (transverse or diagonal passages) |
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| a crystallized calcium phosphate salt - 85% of inorganix matter in the matrix |
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1/3 organic - collagen & protein-carbohydrate complexes
2/3 inorganic |
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Definition
consists of a lattice of delicate slivers of bone called spicule (rods or spines) and trabeculae (thin plates)
covered with endosteum |
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Definition
soft tissue that occupies the marrow cavity of a long bone, spaces amid the trabeculae of spongy bone and the larger central canals
red and yellow |
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| hemopoietic tissue - produces red blood cells |
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| no longer produces blood, unless sever or chronic anemia occurs |
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Definition
| procedure in which bone fragments are manipulated into their normal positions without surgery |
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| surgical exposure of the bone and use of plates, screws or pins to realign the fragments |
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Definition
| promotes mineralization and lowers blood calcium concentration in children - but usually has little effect in adults |
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| raises blood calcium level - raises osteoclast population to promote bone resorbstion - calcium resorbtion by kidneys - inhibits collagen synthesis by osteoblasts |
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