hueso y cartilago
TRANSCRIPT
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Luis Humberto Cruz Contreras
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Soporte y protección
Reserva Calcio y fosforo
Metabolismo y mecánica
•Matriz calcificada
Tejido conectivo especializado
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Osteocito Osteoblasto
Osteoclasto
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Endostio Periostio
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Superficie ósea
Semeja epitelio
Cuboidales
Citoplasma basófilo
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Lagunas
Laminas
•GAP junctions
Procesos
Vida larga
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Fusión de cél. MO
•5-50 núcleos
Lagunas de Howship
Borde irregular, zona clara, colagenasas
Act. hormonas y citocinas
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Inorgánica
•50% del peso
•Calcio y fosforo
•Cristale de hidroxiapatita
Orgánica
•Colageno Tipo I
• Sustancia amorfa
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Fibroblastos y colágeno
Fibras de Sharpey
Células de osteoprogenitoras
•Cél. Progenitores, escaso tej. conectivo
Endostio,
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Largos
•Tubulares
Cortos
•Cuboidales
Planos
•Craneo
Irregulares
•Cara
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•Laminas concéntricas 20
•Conducto central
•Osteocitos en lagunas
•Líneas de cementos
Osteona cortical – S Havers
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Membranosa
Encondral
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TGF BCalcitonina
y PTHEsteroides
Act. física Vit D