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SKELETAL SYSTEM (FUNCTION OF BONE (MOVEMENT - Muscles use bones as levers…
SKELETAL SYSTEM
FUNCTION OF BONE
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SUPPORT - Hard framework, lower limbs support trunk, ribs support thoracic wall
JOINTS
CLASSIFICATIONS - Synarthrosis, Amphiarthosis & Diarthrosis
STRUCTURAL - Fibrous, Cartilaginous & Synovial
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BONE CELLS
OSTEOBLASTS - Bone building/forming cells - Lay down new bone - Osteoid (non-mineralised bone matrix
OSTEOCLAST - Break down or reabsorb bone - Secrete acids that dissolve matrix releasing stored minerals or aid in growth and repair
OSTEOCYTES - Matrix bone cells and form boned tissue, maintain exchange of nutrients & waste with blood - Maintain bones
BONE REMODELING & REPAIR
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REPAIR
- Inflammation/haematoma formation
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BONE MATRIX - Collagen (tensile strength) - Crystalised Minerals (hardness) - Ground Substance (acts as a median for diffusion)