the skeletal system no bones about it! did you know? the adult skeleton has 206 bones

Download The Skeletal System NO BONES ABOUT IT! Did you know? The adult skeleton has 206 bones

If you can't read please download the document

Post on 18-Jan-2016




6 download

Embed Size (px)


  • The Skeletal System

    NO BONES ABOUT IT!Did you know?The adult skeleton has 206 bones

  • Things to Know:Oste boneArt joint-blastgerm or embryonic-clastbroken-cytecellPeri-aroundDia-between or acrossEpi-uponHemat-blood

  • The Skeletal SystemParts of the skeletal systemBones (skeleton)Joints (flexibility)Cartilages (cushion)Ligaments (connect bone to bone)

  • Functions of BonesSupport the body (internal framework)Protect soft organs (vertebrae)LAllow movement due to attached skeletal musclesStore minerals and fats (fats, clacium, phosphorus)Hematopoiesis (Blood cell formation)

  • The Skeletal SystemTwo subdivisions of the skeleton1. Axial skeleton (skull, ribs, spine)2. Appendicular skeleton (pectoral girdle, pelvic girdle, bones of limbs)

  • Figure 5.1aShaftHeadHeadLong bones Have a shaft with heads at both endsTypically longer than they are wideContain mostly compact boneExamples:Femur (longest bone in the body)Classification of Bones by Shape

  • Anatomy of a Long BoneDiaphysisCompact boneProtected by periosteum (membrane)Epiphysis Ends of the boneThin layer of compact boneBut mainly spongy bone in the middleProtected by articular cartilage

  • Anatomy of a Long BoneMedullary cavity Cavity inside of the diaphysisContains yellow marrow (mostly adipose) in adultsContains red marrow (for blood cell formation) in infants

  • Figure 5.1b2. Short bonesGenerally cube-shapeContain mostly spongy boneExample:CarpalsTarsalsPatella

  • 3. Flat bonesThin, flattened, and usually curvedTwo thin layers of compact bone insideLayer of spongy bone insideExample: SkullRibsSternum

  • 4. Irregular bonesIrregular shapeDo not fit into other bone classification categoriesExample: Vertebrae Hip bones


View more >