5. BONE.ppt - Anatomy & Physiology I Unit I Skeletal System...

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Anatomy & Physiology IUnit ISkeletal System - Bone
SKELETON FUNCTIONSProtectionSkull,Verterbral column,Ribs, PelvisMovementHematopoiesisRed cells, White cells,PlateletsMineral storageCalcium, PhosphorusSupport
BONE CELLSOsteogenic cellsUnspecializedDivide to formother typesOsteoblastsBone formationOsteocytesMature bone cellsTrapped in matrix
BONE CELLSOsteoclastsForm fromwhite blood stem cellsBone breakdown
MATRIXInorganic saltsCalcium phosphatecrystalsHardnessOrganic matrixCollagenToughness and strengthMacromoleculesChondroitin sulfate,Hyaluronic acid
TYPES OF BONESpongy boneCompact bone
MICROSCOPICSTRUCTURE OF BONEThe OsteonLaid down in ringslamellaeAroundHaversion(central)canalsLinked toblood vesselsbyPerforatingcanals
MICROSCOPICSTRUCTURE OF BONEOsteocytesin spacescalledlacunaeconnected bycanaliculi
BONE FORMATIONMICROSCOPICOsteoblasts secretecollagenfibersCollagen drawscalcium +phosphateOsteoblaststrappedin matrixSurroundedbylacunae
BONE FORMATIONMICROSCOPICOsteoblasts lose ability to form bonebecomeosteocytesChannels through bonecanaliculicarry nutrients+ wastesto andfromOsteocytes

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Term
Fall
Professor
ErikSildorff
Tags
formation of granulation tissue

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