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22 Cards in this Set
- Front
- Back
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Bone (structure)
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Osteocytes embedded in hydroxyapatite
Type I collagen |
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Compact bone
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Bone that is cortical with a dense mass
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Cancellous bone
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Trabecular bone
Loose bone |
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Periosteum
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Found on the outside of bones
Has osteogenic cells |
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Endosteum
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Line the inner cavities of bones
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Haversian canal
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Canal for blood vessels to run through
Center of an osteon |
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Osteon
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Trapped osteocyte and its canniculi
And Haversian canal |
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Volkmann's canals
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Connect Haversian canals together
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Lamellae
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Parallel arrays of mineralized collagen fibers forming the concentric circles of osteons
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Osteoclasts
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Breakdown bone
Dig themselves into a hole (Howship's lacuna) |
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Bone growth
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All growth is appositional
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Intramembraneous ossification
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Direct differentiation of cells into osteoblasts
No cartilage involved |
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Endochondral ossification
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A ring of perichondrium differentiates into periosteum
Inner chondrocytes hypertrophy Matrix calcifies Blood vessel penetrates region and bone begins to be deposited |
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Diaphysis
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Middle of the bone
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Epiphysis
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Top of the bone
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Secondary center of ossification
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In the epiphysis
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Epiphyseal growth plate (sections)
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From epiphysis:
Resting Proliferation Hypertrophy Calcification Ossification |
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Bone modeling
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Changes in bones from birth to puberty
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Bone remodeling
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Cycles of breakdown and rebuilding in bone
Formation of new osteons Interstitial lamellae are remnants of remodeling |
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Interstitial lamellae
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Remnants of remodeling
Remnants of old Haversian systems |
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Parathyroid hormone (bones)
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Stimulates resorption
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Calcitonin (bones)
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Inhibits osteoclasts
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