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Growth Plate
Aka: Growth Plate, Ossification Center, Epiphyseal Line, Epiphyseal Plate, Bone Collar, Periosteal Bud, Long Bone Growth, Bone Development
- See Also
- Epiphyseal Fracture (Salter-Harris Fracture)
- Femoral Growth Plates
- Lower Leg Growth Plates
- Foot Growth Plates
- Humerus Growth Plates
- Hand Growth Plates
- Scapula Growth Plates
- Spine Growth Plates
- Forearm Growth Plates
- Physiology: Development
- Hyaline Cartilage
- Hyaline cartilage is the initial structure or mold into which bone forms
- Bone Collar
- Forms along the outer margin of the bone (at future diaphysis)
- Primary Ossification Center
- Hyaline cartilage deteriorates and cavitates centrally forming a hyaline cavity
- Medullary (central) spongy bone formation
- Spongy bone forms centrally from primary Ossification Center
- Periosteal Bud
- Vascular connective tissue from the perichondrium (outer margin) invades central hyaline cavity
- Forms future blood supply to Medullary cavity
- Medullary cavity
- Bony cavity replaces prior hyaline cartilage cavity
- Secondary Ossification Center
- Spongy bone forms from secondary Ossification Center (at each long bone end)
- Develops into epiphyseal bone
- Epiphyseal Plate cartilage (epiphysis or Growth Plate)
- Cartilage remains between bone formed from primary (central) and secondary (epiphyseal) Ossification Centers
- Remaining cartilage functions as a Growth Plate for Long Bone Growth
- Articular cartilage
- Hyaline cartilage remains at the long bone ends at joint margins
- All other hyaline cartilage is replaced by bone, aside from at the epiphysis
- Anatomy: Layers
- Articular cartilage
- Epiphysis (rounded bone end)
- Epiphyseal Plate or Growth Plate
- Resting Zone of hyaline cartilage
- Proliferating Zone of hyaline cartilage
- Hypertrophic Zone of hyaline cartilage
- Calcified Zone of hyaline cartilage
- Metaphysis
- Diaphysis