Cardiac muscle Coloured transmission electron micrograph TEM of cardiac muscle fibrils pinkfrom a healthy heart Mitochondria blue supply the muscle cells with energy The muscle fibrils or myofibrils are crossed by transverse tubules narrow dark red lines These tubules mark the division of the myofibrilsinto contractile units sarcomeres In the centre is an intercalated disc strong undulating brownline Intercalated discs are double membranes that separate adjacent cells in the muscle fibres They facilitate synchronised contraction of the muscle Cardiac muscle is under subconscious control and continuously contracts to pump blood around the body without tiring Magnification x when printed centimetres across
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Product ID: 22105968104A