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5373979145Muscleeasy0
5373979146Fasicadense connective tissue1
5373979983muscle fiberA muscle cell. It contains multiple nuclei.2
5373979984sarcolemmatubular sheath that envelops the fibers of skeletal muscles.3
5373980708muscle fibrilis a basic rod-like unit of a muscle cell.4
5373981670sarcoplasmic reticulumregulates the calcium ion concentration in the cytoplasm of striated muscle cells.5
5373983369muscle filaments6
5373985091sacomereThe smallest functional unit of a muscle cell. In other words, the smallest unit that con contract7
5373985092Voluntarymove at will8
5373985811Involuntarycannot move at will9
5373985812Straitedmuscle tissue in which the contractile fibrils in the cells are aligned in parallel bundles, so that their different regions form stripes visible in a microscope10
5373986817contractionshortening of muscle11
5373986818Relaxationlengthening of muscle12

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