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A system of chambers of the [[Endoplasmatisches_Retikulum/en|endoplasmic reticulum]] of (striated) muscle cells (sarcoplasmic reticulum), which can cause muscle contraction by [[Myosinfilamente/en|myosin filaments]] and [[Aktinfilamente/en|actin filaments]] by expulsion of [[Calcium/en|calcium]]. | A system of chambers of the [[Endoplasmatisches_Retikulum/en|endoplasmic reticulum]] of (striated) muscle cells (sarcoplasmic reticulum), which can cause muscle contraction by [[Myosinfilamente/en|myosin filaments]] and [[Aktinfilamente/en|actin filaments]] by expulsion of [[Calcium/en|calcium]]. | ||
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A system of chambers of the endoplasmic reticulum of (striated) muscle cells (sarcoplasmic reticulum), which can cause muscle contraction by myosin filaments and actin filaments by expulsion of calcium.