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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.
5.Unlike the skeletal muscles, there are gap junctions in the cardiac muscles, and their contractions function independently from each other. 6.There are only one or two nuclei in the cardiac muscle cells, while the skeletal muscle cells are multi-nucleated.he cellular characteristics of the cardiac and skeletal muscles differ greatly. The cardiac muscle cell is short when compared to the skeletal muscle cell, and the shape of the cardiac muscle cell can be referred to as âsemi-spindleâ, while the shape of a skeletal muscle cell is cylindrical.