Friday, November 12, 2010
MUSCULAR SYSTEM
MUSCULAR SYSTEM IS MAINLY COMPOSED OF MUSCLES. MUSCLES ARE ALL CONTRACTILE TISSUES, THAT IS APPROXIMATELY THE DIAMETER OF A HAIR. IT CAME FROM THE LATIN WORD "MUS" WHICH MEANS MOUSE SINCE IT MOVES LIKE A MOUSE UNDER OUR SKIN. IT HAS 3 TYPES THE SKELETAL, THE SMOOTH AND THE CARDIAC MUSCLES. SKELETAL MUSCLES ARE VOLUNTARY MUSCLES THAT IS ATTACHED TO THE BONES. IT IS ALSO CALLED STRIATED MUSCLES AND IT PROVIDES MOVEMENT FOR THE BODY. SMOOTH MUSCLES ARE THE ONE FOUND IN OUR ORGANS THEY ARE INVOLUNTARY. CARDIAC LIKE SMOOTH MUSCLE IS INVOLUNTARY AND IT IS FOUND IN OUR HEART. THE PRIMARY MOVERS ARE THE AGONISTS WHILE THE MUSCLE CAUSING MOVEMENT TO OPPOSITE DIRECTION IS THE ANTAGONISTS. THE MUSCLE END ATTACHED TO THE STATIONARY BONE IS THE POINT OF ORIGIN AND THE MUSCLE THAT IS ATTACHED TO THE MOVING BONE IS CALLED THE POINT OF INSERTION. THE ONE WHO ASSISSTS IN MOVEMENT IS THE SYNERGISTIC. ROTATION IS THE CIRCULAR MOVEMENT OCCURING AROUND AN AXIS. ABDUCTION IS THE MOVEMENT AWAY FROM THE MIDLINE OF THEBODY IS ABDUCTION AND THE OPPOSITE OF IT IS ADDUCTION.
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