Cardiac muscle and capillary, TEM
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Cardiac muscle and capillary, TEM
Cardiac muscle. Coloured transmission electron micrograph (TEM) of cardiac muscle fibrils (orange and purple)from a healthy heart. Mitochondria (blue) supply the muscle cells with energy. The muscle fibrils, or myofibrils, are crossed by transverse tubules (dark purple lines). These tubules mark the division of the myofibrils into contractile units (sarcomeres). The central structure is a capillary seen in cross-section, with a bi-concave red blood cell (red) passing along it. Cardiac muscle is under subconscious control and continuously contracts to pump blood around the body without tiring. Magnification: 3200x when printed 10 centimetres across
Science Photo Library features Science and Medical images including photos and illustrations
Media ID 6420322
© THOMAS DEERINCK, NCMIR/SCIENCE PHOTO LIBRARY
Biconcave Blood Capillary Cardiac Cardiology Continuous Contractile Unit Erythrocyte Fibre Fibril Fibrils Micrograph Microscope Mitochondrion Muscles Myocardium Myofibril Myofibrils Organelle Organelles Pump Red Blood Cell Sarcomere Sarcomeres Supply Transmission Electron Transmission Electron Micrograph Transverse Tubules Tubule Units Z Lines Cells False Coloured
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