53.4 MB (4.2 MB compressed)
5195 x 3592 pixels
43.9 x 30.5 cm ⏐ 17.3 x 12.0 in (300dpi)
ASTRID & HANNS-FRIEDER MICHLER / SCIENCE PHOTO LIBRARY ASTRID & HANNS-FRIEDER MICHLER / SCIENCE PHOTO LIBRARY
Light micrograph of a longitudinal section of the trachea with lumen (white) at top. The epithelium (dark violet at top) is tall, pseudostratified and ciliated and contains numerous goblet cells (light violet). The epithelium is supported by a basement membrane which is not clearly visible here. Beneath this membrane there is a layer of loose, highly vascular connective tissue, the lamina propria, which becomes condensed at centre to form a band of fibro-elastic tissue. The loose submucosa (bottom) contains numerous mixed sero-mucous glands. A group of these is visible at bottom left. Magnification: x50 at 35mm size.
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