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24 Cards in this Set
- Front
- Back
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What type of bone shapes are there. |
Long,short,flat,irregular |
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what is a Epiphysis? |
end of the bone. contains cancellous |
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what is a Epiphysis plate |
growth plate, Hyaline cartilage; present until growth stops |
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what is an Epiphyseal line? |
bone strops growing in length |
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What is a Medullary Cavity? |
In children medullary Cavity is red marrow, gradually changes to yellow in limb bones and skull (except for epiphyses of long bones) res of skeleton is red |
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what are sharpey fibers? |
some periosteal fibers penetrate through the periosteum and into the bone. Strengthen attachment of tendon bone. |
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what is a woven bone? |
collagen fibers randomly oriented |
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what are Lamellar bone |
mature bone in sheets |
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what is cancellous bone |
trabeculae |
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what is a compact bone |
Dense |
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hydroxyapetite + collagen make up what? |
Bone matrix |
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what is Canaliculi ? |
canals occupied by osteocyte cell processes. Nutrients diffuse through here to other cells |
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what is a lacunae? |
spaces occupied by osteocyte cell body |
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woven bone are what ? and when do they form? |
collagen fibers randomly oriented -formed during fetal development during fracture repair |
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what happens in the remodling of bone |
removing old bone and adding new -woven bone is remodeled into lamellar bone |
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what is Lamellar bone? |
mature bone sheets called lamellae. Fibers are oriented in one direction in each layer, but in different directions in different layers for strngth |
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central or haversian canals are what? |
parallel to long axis |
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what is a lamellae? |
concentric, circumferential, interstitial |
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central or haversian canals associate with ?
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central canal, contents, associated concentric lamellae and osteocyes |
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perforating or Volkmanns canal |
perpendicular to long axis. Boh perforating and central canals contain blood vessels |
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osteons (Haversian systems) |
-blood vessel filled central canal -concetric lamellae of bone surrounded central canal -lacunae and canaliculi contain osteocytes and fluid |
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what is Circumferential Lamaelle |
on the periphery of a bone |
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what is interstitial Lamellae |
between osteons. Remnants of osteons replaced through remodeling |
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What two types of Bone development are there |
intramembranous ossification-takes place in connective tissue membrane -fontanels, forms skull cap (calvaria) -Endochondral ossification -takes place in cartilage -most bone is formed this way |
