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1. spongy-meshwork of small bony plates filled w red blood cells. at epiphyses of long bones and center of other bones.
2. compact-hard and dense, outer layer of bone |
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shaft. compact bone surrounds medullary (marrow) cavity.
medullary cavity in adults contains fat (yellow marrow) |
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| ends of bone. expanded in width. spongy bone interior. epiphyseal line (remnant of growth plate). hyaline cartilage on join surfaces. |
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| lines outside of bones. 2 layers: outer fibrous and inner osteogenic. nerve fibers, nutrient blood vessels, and lymphatic vessels are often wrapped in periosteum |
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| lines inside structures. delicate membrane on internal surfaces of bone like the marrow cavity |
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| stem cells in periosteum and endosteum that give rise to osteoblasts |
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| cells that break down (resorb) bone matrix |
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| haversian system or osteon |
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weight-bearing
column-like matrix tubes, fit one inside the other
calcified matrix/connective tissue |
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| central (haversian) canal |
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| contains blood vessels and nerves |
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| spaces between lamellae that have bone cells. hold bone cells |
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