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A Muscle is a contractile tissue grouped into coordinated systems for greater efficiency. Each skeletal muscle consists of thousands of muscle fibers wrapped together by connective tissue sheaths.
A Fascicle is a bundle of muscle fibers, also called myocytes, bound together via the endomysium tissue that provides pathways for the passage of blood vessels and nerves.
Each skeletal muscle fiber is a single cylindrical muscle cell surrounded by connective tissue called the endomysium. Each muscle fiber is comprised of several myofibrils containing multiple myofilaments.