JOSE CALVO / SCIENCE PHOTO LIBRARY JOSE CALVO / SCIENCE PHOTO LIBRARY
Pleural surface of the lung, light micrograph. This is the surface of the lung in contact with the pleural cavity. There is a very thin layer of connective tissue with collagen (blue) and elastic (purple) fibres. Gallego-Cajal method. Magnification: x360 when printed at 10 centimetres wide.
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