The trachea has a number of adaptations: cartilage rings in the walls of the trachea help to keep it open ciliated epithelium and goblet cells ... parts of the respiratory system as shown here.
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Study provides new insights into the central role of goblet cellswhich act not only as a physical barrier but also as a sophisticated communication link between the gut lining and the immune system. Goblet cells secrete mucus, forming a protective layer that ...
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