Musculoskeletal System I - LECTURE SLIDES

Musculoskeletal System I - LECTURE SLIDES - M u scu lo...

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1 Musculoskeletal system I The Skeleton: an overview 1.Bone provides general structural support for the whole body and give us shape. Bone Facts 2. Bone provides protection for the brain (skull) and internal organs (ribs, pelvis). Bone Facts 3. Bone provides a structural framework for the bone marrow (source of all blood cells and musculoskeletal cell progenitors). Bone Facts
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2 4. Bone provides attachment sites for muscles. Bone Facts 5. Bones act as levers; joints are the fulcrums or pivot points aiding efficient locomotion. Bone Facts 6. Bone provides a mineral reservoir of calcium and phosphate. Bone Facts 7. Excellent biomaterial: bone is strong but light, it can adapt to functional demands and can self repair. Bone Facts
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3 Long (Tubular) Short Flat (Tabular) Shapes of Whole Bones Long Bones: • Longer in one direction than in the other. • Cross section is roughly circular. • Wall thickness 1/5th overall diameter. • Hollow in the midsection (medullar cavity). • Expanded at the ends. Shapes of Whole Bones • Ends usually covered with articular hyaline cartilage. • Many flanges, ridges and tubercles for attachment of muscles and ligaments. • Function as levers for locomotion. • Designed to carry compressive and bending loads. Long Bones Diaphysis Metaphysis Epiphysis Physis: growth plate Long Bone Regions From Greek Physis: phyein: to generate
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4 Shapes of Whole Bones Short Bones: • Roughly the same size in all directions. • Thin cortices. • Filled with trabecular bone. • Compressive loads over short distances. Shapes of Whole Bones Flat Bones: • Thin in one dimension and larger in the other two.
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This note was uploaded on 04/05/2011 for the course APC 100 taught by Professor Kelliewhited during the Spring '07 term at UC Davis.

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Musculoskeletal System I - LECTURE SLIDES - M u scu lo...

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