Skeletal_System_good

Skeletal_System_good - Chapter 5 Chapter Bones and Skeletal...

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Chapter 5 Chapter 5 Bones and Skeletal Tissue
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Bones and Cartilages of the Bones and Cartilages of the Human Body Human Body Figure 6.1
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How are bones classified? How are bones classified? Axial skeleton – bones of the skull, vertebral column, and rib cage Appendicular skeleton – bones of the upper and lower limbs, shoulder, and hip
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Long bones Long bones Long bones longer than they are wide (e.g., humerus) Figure 6.2a
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Short bones Short bones Short bones Cube-shaped bones of the wrist and ankle Bones that form within tendons (e.g., patella) Figure 6.2b
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Flat bones Flat bones Flat bones thin, flattened, and a bit curved (e.g., sternum, and most skull bones) Figure 6.2c
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Irregular bones Irregular bones Irregular bones – bones with complicated shapes (e.g., vertebrae and hip bones) Figure 6.2d
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What are the functions of What are the functions of bones? bones? Support Support – form the framework that supports the body and cradles soft organs Protection Protection – provide a protective case for the brain, spinal cord, and vital organs Movement Movement – provide levers for muscles Mineral storage Mineral storage – reservoir for minerals, especially calcium and phosphorus Blood cell formation Blood cell formation – hematopoiesis occurs within the marrow cavities of bones
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What is the Gross Anatomy of What is the Gross Anatomy of Bones? Bones? Compact bone Compact bone – dense outer layer Spongy bone Spongy bone – honeycomb of trabeculae (little beams) filled with red bone marrow
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What is the structure of a long What is the structure of a long bone? bone? Diaphysis Diaphysis Tubular shaft that forms the axis of long bones Composed of compact bone that surrounds the medullary cavity Yellow bone marrow (fat) is contained in the medullary cavity
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This note was uploaded on 11/10/2011 for the course PDBIO 220 taught by Professor Tomco during the Winter '09 term at BYU.

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Skeletal_System_good - Chapter 5 Chapter Bones and Skeletal...

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