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Coloured SEM of human tracheal epithelium
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Coloured SEM of human tracheal epithelium
Trachea. Coloured scanning electron micrograph (SEM) of epithelial cells lining the human trachea (windpipe). Some of the cells are covered in cilia (pink), while others have tiny microvilli (blue) which increase the surface area of the cells. The epithelium is covered in mucus which traps large dust particles and removes gaseous pollutants such as ozone and sulphur dioxide from inhaled air. The cilia beat rhythmically, filtering particles suspended in the incoming air, and sweeping dust and other foreign material back towards the larynx. Magnification unknown
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Media ID 6422818
© STEVE GSCHMEISSNER/SCIENCE PHOTO LIBRARY
Cilia Epithelium Microvilli Respiratory System Trachea
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This print showcases the intricate beauty of human tracheal epithelium, revealing a world unseen by the naked eye. The coloured scanning electron micrograph (SEM) captures the delicate lining of the trachea, commonly known as the windpipe. The image portrays a diverse array of epithelial cells that form this vital respiratory structure. Some cells are adorned with vibrant pink cilia, while others display tiny blue microvilli. These microscopic structures serve distinct purposes - cilia act as filters and sweep away foreign particles suspended in inhaled air, while microvilli increase surface area for enhanced efficiency. A remarkable feature depicted here is the mucus layer covering the epithelium. This sticky substance plays an essential role in trapping large dust particles and eliminating harmful gaseous pollutants like ozone and sulphur dioxide from entering our lungs. The rhythmic beating motion of the cilia is another fascinating aspect captured in this image. Their coordinated movement ensures effective filtration by propelling dust and other foreign materials back towards the larynx for expulsion. While we remain unaware of its magnification level, this SEM offers us a glimpse into one of our body's crucial anatomical components - reminding us of its extraordinary ability to protect and maintain our respiratory system's health.
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