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Bone Growth, Development & Remodeling

Bone Growth, Development & Remodeling. Bone Development. Ossification - The process of bone development The skeleton starts development around the 6 th or 7 th week of life. Two types of development.

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Bone Growth, Development & Remodeling

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  1. Bone Growth, Development & Remodeling

  2. Bone Development • Ossification- The process of bone development • The skeleton starts development around the 6th or 7th week of life. • Two types of development. • Intro-membranous-Bone cells begin making bone between sheets(membranes) of connective tissue. • Flat bones like those of the skull develop this way. • Endochondral- Uses cartilage template to develop bone. • Epiphyseal Plate (growth plate) & Articular cartilage left-over from template. • Occurs in two places • 1.Primary ossification center: Makes spongy bone • 2. Secondary ossification center: Makes compact bone.

  3. Bone Growth • The increase of the size of the bone. • Bone growth occurs two ways • Interstitial-The lengthwise expansion of bone. • Takes place at the epiphyseal plate. • Epiphysis & diaphysis will fuse together here when growth is done. • Appositional-The increase in bone width. • Creates medullary cavity • Continues through life and creates thicker, stronger bones.

  4. Bone Remodeling • The reconstruction of bone. • Every bone in the body is recycled at least twice by age 60. • Some bones recycle faster because of their location. • Doesn’t take place in every bone at the same time. • Allows for minerals to be available to the organs of the body. • Occurs most frequently in those bones under the most stress.

  5. Bone Abnormalities/Conditions • Osteoporosis- Soft bone, bone not made properly resulting in weak bones. • Osteomyelitis-Inflammation or swelling of bone tissue. • Rickets-Bending and distortion of bones under muscle action, results from a lack of vitamin D. • Osteosarcoma- Bone cancer.

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