The thin, transparent, extensible membrane covering every striated muscle fiber. It consists of a cell membrane (plasma membrane) and an outer coat made up of a thin layer of polysaccharide material with numerous thin collagen fibrils.
Its structure and design is essential in receiving and conducting stimuli. At every end of the muscle fiber, the outer layer of the sarcolemma fuses with a tendon fibers, which in turn collect into bundles to form muscle tendons.
Word origin: sarco– + Greek lemma, husk.