The C-shaped rings in the trachea are primarily composed of hyaline cartilage. This type of cartilage provides structural support while allowing some flexibility. The open part of the C-shape faces the esophagus, which allows the trachea to expand slightly when swallowing. The trachea is also lined with a mucous membrane that contains ciliated epithelial cells and goblet cells, which help to trap and expel foreign particles and pathogens.
The tissues that make up the C shaped rings in the trachea
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