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The document discusses the structure and types of muscles in the human body. It describes three types of movement - amoeboid, ciliary, and muscular - as well as three main types of muscles - skeletal, smooth, and cardiac. The structure of muscles is then outlined, noting the organization of muscle bundles, fibers, sarcolemma, myofilaments, proteins like actin and myosin that make up sarcomeres, and other components important for muscle contraction.
