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Between the ends of adjacent cardiac muscle cells are specialised intercellular junctions called INTERCALATED DISCS (shown right). These are irregular transverse thickenings of the sarcolemma that contain structures called DESMOSOMES. Desmosomes are like spot-rivets, that hold adjacent cardiac muscle fibres together.
Composed of orderly arrangement of connective tissue and contractile cells. Entire muscle is surrounded by connective tissue wrapping, Epimysium. Skeletal Muscle is made of Fasicles, which are bundles of individual muscle cells, which are each surrounded by a connective tissue layer called Perimysium. Internal Structure of Skeletal Muscle. A bundle of muscle cells (fibers) bound together by connective tissue to form a functional unit.