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skeletal system
| Question | Answer |
|---|---|
| 5 main jobs of the skeletal system | 1. structure/support 2. movement 3. blood cell synthesis 4. storage of inorganic salts 5. store calcium and vitamin D |
| how many types of bones are there | 4 |
| what are the 4 types of bones | long, short, irregular, and flat |
| tough outer layer on bones | periosteum |
| cavity inside bones is called | medullary cavity |
| medullary cavity houses | marrow, blood vessels |
| the ends of long bones are called | epiphyses, either proximal or distal |
| vertical canals in bones are called | Haversian canals |
| horizontal canals in bones are called | Volkmann canals |
| the basic structural unit of compact bone, consisting of a central canal surrounded by concentric rings of bone | osteon |
| bone-forming cells | osteoblasts |
| bone-breaking cells. break down old or damaged bone | osteoclasts |
| epiphyseal line, aka | growth plate |
| Fossa | a depressed area |
| facet | joins of the spines on vertebrae |
| fracture as a result of twisting | spiral |
| common spinal injury from a fall | compression |
| fracture of bone in several pieces | comminuted |
| 4 steps to fracture repair | 1. hematoma. blood travels to the injury to heal tissue and stop bleeding. hours 2. fibroblasts form cartilage between broken bone 3. osteoblasts form new bone 4. osteoclasts destroy excess bone |
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