Presentation on theme: "SAP2b: Relate structure and function in skeletal system"— Presentation transcript:
1SAP2b: Relate structure and function in skeletal system Anatomy November 6thWarm Up: Brief definition of these terms: pg 134: axial skeleton,appendicular skeleton, compact bone, spongy bone,Classwork: Introduction to skeletal system; color sheet bone structureClosing: discussion of bone types
3System Functions: Support (bones, cartilage, ligaments) Protection (ribs & skull)Movement (muscle to bone by tendons)StorageCalcium & Phosphorus in boneAdipose in Yellow Bone MarrowBlood Cell Productionin Red Bone Marrow
22Ossification – Bone Formation By OsteoblastsA matrix of collagen and proteoglycans is laid down by the osteoblastsOsteocytes form (this starts during fetal development & ends around yr of age)
23Bone Growth in Length Composed of cartilage Epiphyseal Plate also called the Growth PlateComposed of cartilageFound between the epiphysis & diaphysisGrowth occurs from this point.When growth stops, the plate cartilage is replaced by bone and it is then called the Epiphyseal Line.
24Bone Growth in WidthNew bone lamellae (sheets of bone cells) are deposited onto existing boneOsteoblasts are deposited onto new bone on top of the periosteum, which increases the width.
25Bone RemodelingAllows for bone to restructure and reshape itself to help to maintain bone strengthExisting bone removed by osteoclasts & deposition of new bone using osteoblasts
28Repair of Bone Fractures Bones contain Nerves and Blood Vessels
29What occurs in a broken bone… damages blood vessels withinbleeding occurs & a clot formsa fibrous network of connective tissue forms at the break – holding bone togethercartilage is addedthis zone of tissue repair is called the Callus
30Cancellous Bone is slowly remodeled to from Compact Bone Continued….Osteoblasts invade the Callus & forms cancellous bone – taking 4-6 weeks for completionCancellous Bone is slowly remodeled to from Compact BoneTotal healing time requires several months for normal bone strength to return
31Bleeding & clotting occurs Fibrous Connective Tissue & Cartilage is formed.Compact bone eventually replaces cancellous bone.Cancellous Bone forms.