Copyright © 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Functions of the Skeletal System  Support  Storage of minerals (calcium)

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Copyright © 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Functions of the Skeletal System  Support  Storage of minerals (calcium)  Storage of lipids (yellow marrow)  Blood cell production (red marrow)  Protection  Leverage (force of motion)

Copyright © 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Classification of Bones  Bones are classified by  Shape  Internal tissue organization  Bone markings (surface features; marks)

Copyright © 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Classification of Bones Figure 6–1 A Classification of Bones by Shape.

Copyright © 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Classification of Bones  Bone Shapes  Long bones  Are long and thin  Are found in arms, legs, hands, feet, fingers, and toes  Flat bones  Are thin with parallel surfaces  Are found in the skull, sternum, ribs, and scapulae  Sutural bones  Are small, irregular bones  Are found between the flat bones of the skull

Copyright © 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Classification of Bones  Bone Shapes  Irregular bones  Have complex shapes  Examples: spinal vertebrae, pelvic bones  Short bones  Are small and thick  Examples: ankle and wrist bones  Sesamoid bones  Are small and flat  Develop inside tendons near joints of knees, hands, and feet

Copyright © 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Classification of Bones

Copyright © 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Classification of Bones

Copyright © 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Classification of Bones  Structure of a Long Bone  Diaphysis  The shaft  A heavy wall of compact bone, or dense bone  A central space called medullary (marrow) cavity  Epiphysis  Wide part at each end  Articulation with other bones  Mostly spongy (cancellous) bone  Covered with compact bone (cortex)  Metaphysis  Where diaphysis and epiphysis meet

Copyright © 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Classification of Bones Figure 6–2 Bone Structure.

Copyright © 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Classification of Bones  Structure of a Flat Bone  The parietal bone of the skull  Resembles a sandwich of spongy bone  Between two layers of compact bone  Within the cranium, the layer of spongy bone between the compact bone is called the diploë

Copyright © 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Classification of Bones Figure 6–2 Bone Structure.

Copyright © 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Compact and Spongy Bone  The Structure of Compact Bone  Dense  Rigid  Harder than spongy bone  Little space

Copyright © 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Compact and Spongy Bone Figure 6–4a The Histology of Compact Bone.

Copyright © 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Compact and Spongy Bone Figure 6–4b The Histology of Compact Bone.

Copyright © 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Compact and Spongy Bone Figure 6–5 The Structure of Compact Bone.

Copyright © 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Compact and Spongy Bone Figure 6–5 The Structure of Compact Bone.

Copyright © 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Compact and Spongy Bone  The Structure of Spongy Bone  The matrix forms an open network  The space filled with red bone marrow:  Which has blood vessels  Forms red blood cells  And supplies nutrients to osteocytes  Yellow marrow  In some bones, spongy bone holds yellow bone marrow  Is yellow because it stores fat

Copyright © 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Compact and Spongy Bone Figure 6–6 The Structure of Spongy Bone.

Copyright © 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Compact and Spongy Bone Figure 6–7 The Distribution of Forces on a Long Bone.

Copyright © 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Bone Formation and Growth  Epiphyseal Lines  When long bone stops growing, after puberty  Epiphyseal cartilage disappears  Is visible on X-rays as an epiphyseal line

Copyright © 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings

Bone Formation and Growth Figure 6–11 Bone Growth at an Epiphyseal Cartilage.

Copyright © 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Bone Formation and Growth Figure 6–11 Bone Growth at an Epiphyseal Cartilage.

Copyright © 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Bone Formation and Growth Figure 6–9 Heterotopic Bone Formation.

Copyright © 2009 Pearson Education, Inc., publishing as Pearson Benjamin Cummings Exercise, Hormones, and Nutrition FIGURE 6–14 Examples of Abnormal Bone Development.