JOSE CALVO / SCIENCE PHOTO LIBRARY JOSE CALVO / SCIENCE PHOTO LIBRARY
Light micrograph of the mucosa of the trachea. It is lined by a ciliated pseudostratified columnar epithelium (respiratory epithelium, upper frame) resting on a connective tissue lamina propria (bottom of frame). Magnification: x900 when printed at 10 centimetres wide.
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