BONE DEVELOPMENT

BONE DEVELOPMENT - BONE DEVELOPMENT Ossification...

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12/11/10 BONE DEVELOPMENT Ossification/ odontogenesis: development of bone Axial: skull, bones of cranium, vertebral column, bones of pelvic girdle, sternum Appendicular: limbs, clavicle, scapula Long bones: femur, tibia, fibula Short bones: carpals+ tarsals
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12/11/10 TWO TYPES OF OSSIFICATION: 1) ENDOCHRONDRAL OSSIFICATION: within cartilage; cartilaginous precursor transformed to bone 2) INTRAMEMBRANOUS OSSIFICATION:within membrane -) no cartilaginous precursor -) Refers to flat bones of skull which develop in the membrane surrounding the developing brain
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12/11/10 ENDOCHRONDRAL OSSIFICATION Most bones Limb development Long bones Bones of hand and feet Vertebrae Base of the skull Cartilage model precedes bone
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12/11/10 DEVELOPMENT TERMS: 5-6 weeks gestation osteogenesis begins Mesenchyme: highly potential tissue from mesoderm develops many structures Mesoderm: germ layers that separate and develop into organs; layer from which skeletal system arises Endoderm: endodermal viscera Ectoderm: hair, nails, nervous system
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This note was uploaded on 12/10/2010 for the course APY 348 taught by Professor Lisjak,r during the Fall '10 term at SUNY Buffalo.

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BONE DEVELOPMENT - BONE DEVELOPMENT Ossification...

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