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25 Cards in this Set
- Front
- Back
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Long bones
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-arms and legs
-Longer than wide |
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Short
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-Cube shaped
-wrist and ankles |
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Flat bones
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-thin flat and curved
-ribs, breastbone, skull |
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Irregular bones
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-not any of the others
-vertebrea and various bones in the skull |
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Bone Cells- osteocytes
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-secretes intracellular substance called matrix
-mature bone cell |
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What makes a bone hard
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Mineral salts
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Compact bone
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-dense hard bone
-tissue found primarily in the shafts of long bones -PROTECTIVE -outter surface of other bones |
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Spongy or cancellous
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-less dense
-located at ends of long bones and in center of other bones -PRODUCTION |
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Osteons IC: haversian system
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-Microscopice unit of compact bone
-consists of mature bone osteocytes -aranged in concentric circles around large blood vessles -are surrounding the osteocytes is filled with protien fibers, calcium, and other minerals |
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compact bones consists of
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many haversian systems running parrel to each other.
Communicating BLood vessels run leterally and connect the haversion system with each other |
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Lacuna
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physical space that houses osteocytes
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microscopic unit of spongy bone is
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trebeculae
-randomly distributed |
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trebeculae
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plates of bars or tissue that create stroma
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spaces are important because
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decrease weight
-contain red blood marrow |
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Red blood marrow is
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hymatopoetic tissue
(ability to produce Blood cells) |
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Long bone
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strenght
-contains site of growth and reshaping and structures associated with joints |
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diaphysis
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Long shaft of the LB
mostly compact bone provides strenght |
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epiphyseal disc
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thin strip of hyline cartilage located inside of the epiphysy
controls longicudianal bone growth |
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Medullary cavity
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hollowed out center of the diaphysis of a LB
-yellow bone marrow (storage fat) -inside cavity lined with endosteum |
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endosteum
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protective lining of the medullary cavity
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Periosteum
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tough fiborous connective tissue outside of the diaphysis
provides physical protection to underlying bone -vascular support -site of muscular attachment (tendons) -doesnt cover articular cartilage |
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articular cartilage
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strip of hylin cartilage found on teh outside of the epiphsy
-reduced friction within a joint |
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ossification
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any tissue being converted into bone tissue
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Flat bones
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INTRA MEMBRANEOUS OSSIFICATION
-thin connective tissue, begins w/ osteoblast or bone forming cells -osteoblast secrete calcium and other minerals into the spaces |
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other bones
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cartilage --- endochondreal ossification
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