Skeletal system - EXS 350 The Skeletal Framework The...

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EXS 350 The Skeletal Framework The musculoskeletal system: o arrangement of muscles and bones o adjacent bones are connected at joints provides constraints on movement patterns o muscles provide force for moving the bones muscles always pull on bones, they never push o taken together, bones, joints and muscles form levers: simple machines with: fulcrum (turning point) rigid bar force applied resistance The Skeleton (206 bones total, only 177 engage in voluntary movement,) Axial skeleton: o skull, spine, ribs, and sternum Appendicular skeleton: o upper and lower extremities Types of Bones (4 Categories) 1. Long bones : o cylindrical shaft with broad ends o body has thick walls and medullary canal (central cavity) examples - femur, tibia, fibula, metacarpals, humerus, ulna, radius, and metatarsals 1. Short bones: o solid, small, and chunky examples - carpals and tarsals 1. Flat bones: o examples - sternum, scapulae, pelvic bones, patellae 1. Irregular bones: o example - spinal column Mechanical Axis of the Bone
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The Mechanical Axis of a Bone is defined as the line drawn from the midpoint of the joint at one end to the midpoint of the joint at the other end (or center of
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This note was uploaded on 09/25/2010 for the course EXS 31757 taught by Professor Brennan during the Spring '10 term at Oakland University.

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Skeletal system - EXS 350 The Skeletal Framework The...

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