STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Nose mucosa. Light micrograph of a section through the nasal mucosa (the tissue that lines the airways of the nose), in the region lying over the nasal concha. The nasal concha is a bony region that is responsible for forcing inhaled air to flow through hair-like cilia. The cilia form the upper surface of the columnar epithelium cells (orange, top) that make up the top layer of the nasal mucosa. The cilia are coated in sticky mucus produced by goblet cells in the membrane, which serves to trap dust and pathogens. Under the epithelium is the glandular and vascular lamina propria (green and purple). Magnification: x300 when printed 10cm wide.
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