Term
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Definition
-Support-structural framework, supports soft tissues (muscles, CT)
-Movement-together with muscle
-Protection-of internal organs
-Storage-fat cells in medullary cavity of long bones, minerals calcium and phosphorous in matrix
-Blood cell production - RBC in spongy bone |
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Term
| Intercellular material (matrix) |
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Definition
-organic-tensile strength-twisting and stretching
-inorganic-gives bone strength to withstand compression, storage of Ca and P |
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Definition
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Definition
| helps to form bone by producing osteoid |
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Definition
| contains enzymes that breakdown bone (resorption) |
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Term
| chrondrocytes/chrondroblasts |
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Definition
-found in lining of medullary cavity (endosteum)
-reproduce during bone development of young individuals
-assist in ossification/calcification |
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Term
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Definition
-2/3 calcium phosphate, hydroxyapitite-very resistant to compression
-1/3 collagen fibers-very resistant to stretch
-cells account for 2-3% of bone tissue |
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Definition
| arranged in concentric layers of bone matrix called lamellae around Haversian canal |
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Definition
| contains nerves and blood vessels that supply the bone |
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Definition
-small channels that connect the cells in their lacunae to the central canal so nutrients can reach osteocytes
-bone have very rich blood supply |
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Definition
-cells are very close together
-dense and smooth look |
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Term
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Definition
-wide spaces in bone that resembles a sponge
-holes full of red marrow |
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Definition
-spongy bone in between two layers of compact bone
-ex. skull, sternum, ribs |
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Definition
-greater in length than width
-shaft is compact bone
-ends are spongy
-ex. femur, humerus, phalanges |
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Term
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Definition
-cube shaped
-spongy bone surrounded by compact bone
-ex. carpals and tarsals |
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Definition
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Definition
form with tendons
ex. patella |
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| plate of cartilage seen in growing bones |
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Definition
-cavity within diaphysis
-filled with yellow marrow |
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Definition
| protective CT outer covering of bone |
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Definition
| hyaline cartilage at the end of long bones for protection |
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Term
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Definition
| process of bone formation |
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Term
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Definition
-deposition of calcium salts
-results in bone hardening |
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Term
| intramembranous bone formation |
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Definition
-osteoblasts in a fibrous CT membrane form bone
-occurs early in fetal development
-ex. flat bones of the skull |
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Term
| endochondral bone formation |
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Definition
-begins with hyaline cartilage model
-osteoblasts gradually replace it with bone
-ex long bones |
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Term
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Definition
-calcium and phosphorus salts
-vitamin A and C
-vitamin D ( for calcium absorption and transport) |
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Definition
-parathyroid hormone
-cacitonin
-GH
-sex hormones |
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Definition
| stimulates osteoclast activity and increases resorption of calcium by intestine |
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Definition
-produced by thyroid gland
-inhibits osteoclasts |
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Definition
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Definition
-hyaline cartilage forms approximate shape
-cells in perichondrium differential into osteoblasts which form bone matrix along shaft
-this plate of compact bone (bone collar) forms and remaining surrounding CT is peristeum |
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