skeletal lecture1rev2.2 - 7-1Chapter 6Skeletal System:Bones...

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Unformatted text preview: 7-1Chapter 6Skeletal System:Bones and Bone Tissue7-2Skeletal System FunctionsSupportProtectionMovementStorageBlood cell production7-3Hyaline CartilageConsists of specialized cellsthat produce matrixCellsChondroblastsChondrocytesPerichondriumArticular cartilageGrowthAppositionalInterstitial7-4Bone ShapesLongUpper and lower limbsShortCarpals and tarsalsFlatRibs, sternum, skull, scapulaeIrregularVertebrae, facial7-5Long Bone StructureDiaphysisShaftCompact boneEpiphysisEnd of the boneCancellous boneEpiphyseal plateGrowth plateEpiphyseal lineBone stops growing in length 7-6Long Bone StructureMedullary cavityRed marrowYellow marrowPeriosteumOuter bone surfaceSharpeys fibersAttachmentEndosteumLines bone cavities7-7Flat, Short, Irregular BonesFlat BonesNo diaphyses, epiphysesSandwich of cancellous between compact boneShort and Irregular BoneCompact bone that surrounds cancellous bone centerNo diaphysesand not elongated7-8Bone HistologyBone matrixOrganic: Collagen and proteoglycansInorganic: HydroxapatiteBone cellsOsteoblastsOsteocytesOsteoclastsStem cells or osteochondral progenitor cellsWoven bone: Collagen fibers randomly orientedLamellar bone: Mature bone in sheetsCancellous bone: TrabeculaeCompact bone: Dense7-9Bone Matrix7-10Bone CellsOsteoblastsFormation of bone through ossification or osteogenesisOsteocytesMature bone cellsLacunae: SpacesCanaliculi: CanalsOsteoclastsResponsible for bone resorption7-11Woven and Lamellar BoneWoven boneFormed During fetal development During fracture repairRemodelingRemoving oldbone and adding newLamellar boneMature bone in sheets called lamellae7-12Cancellous BoneConsists oftrabeculaeOriented along lines of stress7-13Compact BoneCentral or haversian canals: Parallel to long axisLamellae: Concentric, circumferential, interstitialOsteon or haversian system: Central canal, contents, associated concentric lamellae and osteocytesPerforating or Volkmanns canal: Perpendicular to long axis7-14Bone DevelopmentIntramembranousossificationTakes place in connective tissue membraneEndochondralossificationTakes place in cartilageBothmethods of ossificationProduce woven bonethat is then remodeledAfter remodeling, formation cannot be distinguished as one or other7-15Intramembranous Ossification7-16Endochondral Ossification7-17Endochondral Ossification7-18Endochondral Ossification7-19Growth in Bone LengthAppositional growthNew bone on old bone or cartilage surfaceEpiphyseal plate zonesResting cartilageProliferationHypertrophyCalcification7-20Growth in Bone Length7-21Growth in Bone Width7-22Factors Affecting Bone GrowthNutritionVitamin DNecessary for absorption of calcium from intestinesInsufficient causes rickets and osteomalaciaVitamin C...
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This note was uploaded on 06/06/2011 for the course BIO 180 taught by Professor Sarahbales during the Spring '11 term at Moraine Valley Community College.

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skeletal lecture1rev2.2 - 7-1Chapter 6Skeletal System:Bones...

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