The Skeletal System Supports the body Protects soft organs Allows movement due to attached skeletal muscles Stores minerals and fats Blood cell formation.
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Post on 27-Mar-2015
<ul><li>Slide 1</li></ul> <p>The Skeletal System Supports the body Protects soft organs Allows movement due to attached skeletal muscles Stores minerals and fats Blood cell formation Slide 2 The Skeletal System Parts of the skeletal system Bones (skeleton) Joints Cartilages Ligaments Two subdivisions of the skeleton Axial skeleton skull, spine, ribs Appendicular skeleton shoulders, arms hips, legs Slide 3 Bones of the Human Body The adult skeleton has 206 bones Two basic types of bone tissue Compact bone Spongy bone Slide 4 Classification of Bones by shape Long bones Typically longer than they are wide Have a shaft with heads at both ends Contain mostly compact bone Example : FemurHumerus Shaft Slide 5 Classification of Bones by Shape Short bones Generally cube-shape Contain mostly spongy bone Example : CarpalsTarsals Slide 6 Classification of Bones by Shape Flat bones Thin, flattened, and usually curved Two thin layers of compact bone surround a layer of spongy bone Example : SkullRibsSternum Slide 7 Classification of Bones by Shape Irregular bones Irregular shape Do not fit into other bone classification categories Example : Vertebrae Hip bones Slide 8 Anatomy of a Long Bone Diaphysis Shaft Composed of compact bone Epiphysis Ends of the bone Composed mostly of spongy bone Slide 9 Anatomy of a Long Bone Periosteum Outside covering of the diaphysis (shaft) Fibrous connective tissue membrane Slide 10 Cartilage = Connective Tissue Cartilage Covers the external surface of long bones Made of hyaline cartilage Decreases friction at joint surfaces Slide 11 When youre growing. Epiphyseal plate Flat plate of hyaline cartilage seen in young, growing bone (a.k.a. = growth plate) Epiphyseal line Remnant of the epiphyseal plate Seen in adult bones Slide 12 Anatomy of a Long Bone Medullary cavity Cavity inside of the shaft Contains yellow marrow (mostly fat) in adults. With severe blood loss, can be converted to red marrow Contains red marrow (for blood cell formation) in infants </p>
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