This document discusses the structure and function of muscle cells. It describes that muscle cells, also called muscle fibers, are surrounded by the sarcolemma membrane and contain myofibrils made up of the proteins actin and myosin that form dark and light bands. It also mentions that muscle fibers are connected through intercalated discs and that their nuclei are located along the edges beneath the sarcolemma. The document provides an overview of the key components of muscle cells.

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sarcolemmasarcolemmanucleisyncytinmsyncytinm

9. myofibrilsmyofibrilsdarkdark and light bandslight bands
myosinmyosinactinactin
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intercalated discintercalated disc

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15. neuronsneurons
neuroglianeuroglia

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23. http://www.bu.edu.eg/staff/doaamohamed7-courseshttp://www.bu.edu.eg/staff/doaamohamed7-courses