DON W. FAWCETT / SCIENCE PHOTO LIBRARY DON W. FAWCETT / SCIENCE PHOTO LIBRARY
Color enhanced Transmission Electron Micrograph (TEM) of a section of frog sartorius. This image shows the differentiations of the system in relation to a single sarcomere. Various components of the sarcoplasmic reticulum can be seen, such as the terminal cistern, the 'a' band, 'z' band, 'i' band, and the 'T' tubule.
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