Alveolus in human lung

Alveolus in human lung

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Credit: PROF. P. MOTTA/DEPT. OF ANATOMY/UNIVERSITY "LA SAPIENZA", ROME/SCIENCE PHOTO LIBRARY

Caption: Alveolus. False-colour scanning electron micrograph (SEM) of an alveolus (blue cavity), one of the microscopic air sacs of the lungs. Adjacent alveoli are separated by a porous membrane (light red) known as the interalveolar septum. An intricate network of capillaries occupies this membrane and it is in this network that the exchange between carbon dioxide and oxygen takes place. The larger ridges in the alveolus denote the positions of underlying capillaries whereas the dark areas are openings, the interalveolar pores, which connect adjacent alveoli. Magnification: x1050 at 6x7cm size. x1675 at 4x5".

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Keywords: alveolus, anatomy, capillary, false-coloured, human body, images, interalveolar septum, lung, lungs, magnified image, microscopic photos, respiratory system, subjects

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