JOSE CALVO / SCIENCE PHOTO LIBRARY JOSE CALVO / SCIENCE PHOTO LIBRARY
Coloured transmission electron micrograph (TEM) showing smooth muscle fibres in cross section. The fibres are separated from surrounding connective tissue (green) by a basal lamina (pink). In the cytoplasm, contractile filaments are light brown, mitochondria are light blue, dense bodies are dark blue and sarcolemma caveolae are red.
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