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19 Cards in this Set
- Front
- Back
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Osteoblasts |
Bone forming cells |
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Osteocytes |
Mature bone cells |
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Osteoclasts |
They resorb or breakdown bone matrix |
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Osteoid |
Unmineralized bone matrix composed of proteoglycans, glycoproteins and collagen |
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What is inorganic bone made of? |
Hydroxyapatites or mineral salts |
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Role of inorganic bone |
For hardness and compressional resistance |
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How much of bone is inorganic? |
65% by mass |
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Role of organic bone |
For flexibility and tensile strength |
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Two types of mammalian bone |
Immature/ woven Mature/ lamellar |
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List the 4 main structures of compact bone |
1. Lamella 2. Osteon/Haversian System 3. Haversian/ Central Canal 4. Volkmanns canals |
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Lamella |
Weight bearing, column like matrix tubes composed mainly of collagen |
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Osteon/Haversian System |
The structural unit of compact bone |
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Volkmanns Canals |
Channels lying at right angles to the central canal, connecting blood and nerve supply to the periosteum or the Haversian canal. |
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Lamellae |
Concentric rings formed by lacunae |
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Lacunae |
Cavity containing osteocytes |
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Canaliculi |
Outward canals that lead to all lacunae ensuring all osteocytes are nourished |
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Does spongy bone contain osteons? |
No |
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Where is spongy bone typically aligned? |
Along lines of stress |
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What is spongy bone made of? |
Irregular lamellae that torm rods or plates |
