Bone classification, major skeletal landmarks, and joint types and movements for allied health students.
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- Long bones
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Longer than wide, with a shaft and two ends (e.g., femur, humerus)
- Short bones
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Roughly cube-shaped bones (e.g., carpals, tarsals)
- Flat bones
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Thin, flattened bones that often protect organs (e.g., sternum, ribs, skull bones)
- Irregular bones
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Bones with complex shapes that fit no other category (e.g., vertebrae, facial bones)
- Sesamoid bones
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Small bones embedded within a tendon (e.g., the patella)
- Diaphysis
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The shaft, or main tubular body, of a long bone
- Epiphysis
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The rounded end of a long bone
- Medullary cavity
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The hollow space inside the diaphysis that holds bone marrow
- Periosteum
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The dense connective tissue membrane covering the outer surface of a bone
- Osteoblasts
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Bone cells that build new bone matrix
- Osteoclasts
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Bone cells that break down and resorb bone tissue
- Osteocytes
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Mature bone cells that maintain bone tissue
- Axial skeleton
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The skull, vertebral column, and rib cage
- Appendicular skeleton
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The bones of the limbs plus the pectoral and pelvic girdles
- Foramen
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An opening in a bone that allows nerves or blood vessels to pass through