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Coloured SEM of healthy heart muscle fibres
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Coloured SEM of healthy heart muscle fibres
Heart muscle. Coloured scanning electron micrograph (SEM) of healthy heart (cardiac) muscle fibres (green). Mitochondria (red) supply the muscle cells with energy. The muscle fibres, or myofibrils, are crossed by transverse tubules (running vertically). These tubules mark the division of the myofibrils into contractile units known as sarcomeres. Cardiac muscle, which is mostly under subconscious control, continuously pumps blood around the body without tiring. Magnification unknown
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Media ID 6420314
© STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY
Cardiac Cardiac Muscle Heart Muscle Mitochondria Muscles Myofibril Transverse Tubule
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This print showcases the intricate beauty of healthy heart muscle fibres. The coloured scanning electron micrograph (SEM) reveals a mesmerizing sight, with the cardiac muscle fibres appearing in vibrant green hues. These fibres play a crucial role in continuously pumping blood throughout the body without ever tiring. The red structures seen within the image are mitochondria, which act as powerhouses supplying energy to these hardworking muscle cells. They ensure that the heart can perform its vital function effectively and efficiently. One striking feature captured by this SEM is the presence of transverse tubules running vertically across the myofibrils, or muscle fibres. These tubules serve as markers, dividing the myofibrils into contractile units called sarcomeres. This organized arrangement allows for coordinated contraction and relaxation of the cardiac muscles, enabling them to pump blood rhythmically. Cardiac muscles primarily operate under subconscious control, making their tireless efforts possible day after day. This remarkable ability ensures that oxygenated blood reaches every corner of our bodies while removing waste products. As we gaze upon this extraordinary image, we gain a deeper appreciation for the complexity and resilience of our own hearts – an organ so essential to sustaining life itself.
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