50.8 MB (1.9 MB compressed)
4371 x 4063 pixels
37.1 x 34.3 cm ⏐ 14.6 x 13.5 in (300dpi)
STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Nasal lining. Transmission electron micrograph (TEM) of a section through cilia (red) covering the epithelial lining of the nasopharyx, the part of the throat behind the nasal cavity. Cilia are microscopic hair-like structures that are covered with a sticky mucus, and trap dust and other inhaled particles. Co-ordinated wave-like beating of the cilia propels the mucus backwards towards the throat, where it is swallowed. Also seen are microvilli (green), which increase the cell's surface area. Magnification: x6000 when printed at 10 centimetres wide.
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