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*~600 MUSCLES IN HUMAN BODY*
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*3 TYPES* –>
*SKELETAL MUSCLE*
*SMOOTH MUSCLE*
*CARDIAC MUSCLE*
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*’muscle cells’ contain ‘protein filaments’ of ‘actin’ + ‘myosin’ that slide past one another, producing a ‘contraction’ that changes the ‘length’ + ‘shape’ of the ‘cell’*
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(a ‘tendon’ is a tough band of ‘fibrous connective tissue’ that connects ‘muscle’ to ‘bone’ and is capable of withstanding ‘tension’)
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(the muscular system is an ‘organ system’ consisting of [‘skeletal’ / ‘smooth’ / ‘cardiac’] muscles)
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*permits movement of the body*
*maintains posture*
*circulates blood throughout the body*
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(the ‘muscular system in vertebrates’ is controlled through the ‘nervous system’…)
(…although some muscles (such as the ‘cardiac muscle’) can be completely autonomous)
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(together with the ‘skeletal system’ it forms the ‘musculo-skeletal system’, which is responsible for ‘movement’ of the ‘human body’)
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*SKETCHES*
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|/\-*WIKI-LINK*-/\|.
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☜ *“THE MUSCULO-SKELETAL SYSTEM”*☞ 
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