Muscle Contraction Interactive and Video
Topics Covered: 
		How muscles contract, the sliding filament model of muscle contraction, 
		flexors and extensors, the biceps and triceps as models of flexors and 
		extensors, muscle structure, the roles of actin, myosin, troponin, 
		tropomyosin, and calcium in muscle contraction etc.  
		
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Body Systems (Physiology)
Cells
Ecology
Evolution &  Classification
Genetics 
	& Meiosis
Life 
	Chemistry (DNA, Proteins, etc,)
Scientific Methods