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8393829838fibermuscle cell0
8393829839Epimysiumconnective tissue wrapping the entire muscle1
8393829840Perimysiumconnective tissue wrapping the fascicle2
8393829841Endomysiumconnective tissue wrapping the muscle fiber3
8393829842fasciclebundle of muscle fibers4
8393829843fibersbundle of myofibrils5
8393829844myofibrilbundle of myofilaments6
8393829845myofilaments consist ofactin and myosin7
8393829846myofilamentsmallest structure8
8393829847sarcolemmaplasma membrane of muscle cell9
8393829848Sarcoplasmcytoplasm of muscle cell10
8393829849sarcoplasmic reticulumholds calcium ion11
8393829850sarcomerecontractile unit of muscle cell12
8393829851AcetylcholineA neurotransmitter that enables muscle contraction13
8393829852synaptic vesiclesholds acetylcholine until its released14
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