Lab_IV_AFall_2010

Lab_IV_AFall_2010 - Lab IV:- Classification and Structure...

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Lab IV:- Classification and Structure of Bones and Cartilages
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The Skeletal System Bones of the skeleton Cartilages, ligaments and other connective tissues that stabilize and connect
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Functions of the Skeletal  System Support Storage of minerals (Ca2+) and lipids Blood cell production ( bone marrow) Protection Leverage
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Cartilages of the Skeleton Connective tissue that is present is various regions of body Contain no nerves and have few blood vessels Surrounded by dense connective tissue; perichondrium
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Cartilages of Skeleton Articular Cartilages:- cover bone ends at movable joints Costal Cartilage:- connects the ribs to the sternum Laryngeal Cartilage:- larynx Tracheal and Bronchial Cartilages Intervertebral discs :- separate and cushion bones of the spine.
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Bone Classification Shape Long bones ( femur and phalanges); mostly compact bone Short bones- cube shaped (tarsals and carpals); mostly spongy bone Flat bones- thin with compact bone sandwiching spongy bone in middle; curved ; bones of the skull Irregular bones Sesamoid ( short bones formed in tendons & sutural ( tiny bones between cranial bones) Structure Spongy bone Compact bone
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Bones by Shape
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Compact Bone vs. Spongy Bone Are composed of two kinds of osseous tissue:- Compact Bone and Spongy Bone Compact Bone :- looks smooth and homogenous Strongest form of bone tissue Basic unit of compact bone is an osteon Osteocytes arranged around a central canal Perforating canals extend between adjacent osteons Spongy Bone :- composed of small trabeculae of bone and lots of open space
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Bone Structure Bone’s shaft or body Proximal and distal ends of  bone
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Compact Bone v. Spongy  Bone
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Bone Histology
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Division of the Skeletal  System Axial skeleton Skull
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Lab_IV_AFall_2010 - Lab IV:- Classification and Structure...

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