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Muscular System
-- there are over 600 muscles that make up the muscular system
-- muscles are made of bundles of muscle fibers
-- the muscle fibers are held together by connective tissue
-- when stimulated by nerve cells, muscles contract
-- when muscles contract, they become short and thick
-- contraction causes movement
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Skeleton
Axial Skeleton -- main trunk of the body -- includes -- skull -- spinal column -- ribs -- sternum
Appendicular Skeleton -- extremities -- includes -- shoulder girdle -- arm bones -- pelvic girdle -- leg bones
