Trachea lining, TEM

Trachea lining, TEM

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Credit: STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY

Caption: Trachea lining. Transmission electron micrograph (TEM) of a longitudinal section through the lining of the trachea (windpipe), which links the larynx (voicebox) to the lungs. The epithelial lining consists of cells that have hair-like cilia (long) on their surface and mucus-secreting glands. Mucus secreted by the glands traps debris, such as dust particles or bacteria, in the inhaled air, while the beating of the cilia moves the mucus and particles upwards out of the respiratory tract, helping to keep the lungs and airways clear and prevent infection. Clear basal bodies and mitochondria (red) are visible in the cell bodies. Magnification: x7000 when printed 10 centimetres wide.

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Keywords: anatomical, anatomy, basal body, biological, biology, bodies, cell, cilia, cilium, cytological, cytology, gland, glands, histological, histology, human body, lining, longitudinal section, microvilli, microvillus, mitochondria, mitochondrion, mucous cell, mucus, mucus-secreting, respiratory system, secretory, sectioned, tem, trachea, transmission electron micrograph, transmission electron microscope, windpipe

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