DON W. FAWCETT / SCIENCE PHOTO LIBRARY DON W. FAWCETT / SCIENCE PHOTO LIBRARY
Electron micrograph of smooth muscle in cross-section. Smooth muscle is a type of non-striated muscle found within the tunica media layer of arteries and veins, the bladder, uterus, male and female reproductive tracts, gastrointestinal tract, respiratory tract, the ciliary muscle and iris of the eye. For the original black-and-white image see: 9M1844.
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