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Cardiac muscle

Cardiac muscle


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Cardiac muscle

Cardiac muscle. Coloured scanning electron micrograph (SEM) of heart (cardiac) muscle fibrils (yellow). The membrane around the muscle has been torn (yellow). A vein (lower centre) has been damaged and a red blood cell can be seen emerging from the blood vessel. Mitochondria (red) supply the muscle cells with energy. The muscle fibrils, or myofibrils, are crossed by transverse tubules (thin lines). These tubules mark the division of the myofibrils into contractile units (sarcomeres). Cardiac muscle is under subconscious control and continuously contracts to pump blood around the body without tiring. Magnification: x1665 when printed 10cm wide

Science Photo Library features Science and Medical images including photos and illustrations

Media ID 6448439

© SUSUMU NISHINAGA/SCIENCE PHOTO LIBRARY

Cardiac Cardio Vascular Cardiology Continuous Contractile Unit Damage Damaged False Colour Fibre Fibril Fibrils Membrane Mitochondria Mitochondrion Muscles Myofibril Myofibrils Organelle Organelles Pump Red Blood Cell Sarcomere Sarcomeres Tear Torn Transverse Tubule Tubules Units False Coloured Vein


EDITORS COMMENTS
This print showcases the intricate beauty of cardiac muscle, captured through a coloured scanning electron micrograph. The vibrant yellow fibrils of the muscle are prominently displayed, with their membrane torn in certain areas, revealing the underlying structure. In the lower centre, a damaged vein can be observed, and an emerging red blood cell adds a touch of life to this microscopic world. The vital role played by mitochondria is highlighted by their striking red coloration. These energy powerhouses supply continuous fuel to the muscle cells, enabling them to tirelessly contract and pump blood throughout the body. Thin transverse tubules crisscrossing the myofibrils mark the division into contractile units known as sarcomeres. Cardiac muscle operates under subconscious control and functions ceaselessly to maintain circulation without fatigue. This image offers a glimpse into its remarkable anatomical complexity and biological processes that sustain human life. With a magnification of x1665 when printed at 10cm wide, this photograph from Science Photo Library provides an awe-inspiring view into cardiology's fascinating realm. It serves as a reminder of our bodies' incredible capabilities and invites contemplation on both its fragility and resilience.

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