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Remodeling

Remodeling. of skeletal structures. Bone tissue is constantly being torn down and built up. About 10% of bone is replaced every year in an adult skeleton. bone formation. bone reabsorption. osteoblasts. osteoclasts. Hormonal effects. bone formation. bone reabsorption. osteoblasts.

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Remodeling

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  1. Remodeling of skeletal structures Bone tissue is constantlybeing torn downand built up About 10% of bone is replaced every year in an adult skeleton

  2. boneformation bonereabsorption osteoblasts osteoclasts

  3. Hormonal effects boneformation bonereabsorption osteoblasts osteoclasts Calcitonin(CT)from thyroid Parathyroidhormone(PTH)from parathyroid

  4. Age effects boneformation bonereabsorption osteoblasts osteoclasts Before age 25

  5. Age effects boneformation bonereabsorption osteoblasts osteoclasts Age 25-50

  6. Age effects boneformation bonereabsorption osteoblasts osteoclasts Age 50-120

  7. Stress effects boneformation bonereabsorption osteoblasts osteoclasts Stress increases bone density

  8. Direction of stress can alter orientation& size of of osteons

  9. Increasing bone stress can reduce or eliminate age-related bone loss

  10. Space travel decreases stress & increases bone loss

  11. Too much stress . . .

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