Trachea the trachea. The trachea is no more than 4mm diameter during the first year of life, expanding to its adult diameter by late childhood. The trachea is more mobile and of more variable length, deeper, and smaller in children. The trachea is lined with a layer of pseudostratified ciliated columnar epithelium. The epithelium contains goblet cells, which are glandular, modified simple columnar epithelial cells that produce mucins, the main component of mucus. Mucus helps to moisten and protect the airways. Mucus lines the ciliated cells of the trachea to trap inhaled foreign particles that the cilia then waft upward toward
You Are What You Is (song) it from being featured on "Canoe", a 1993 episode of the American television show "Beavis and Butt-Head", also aired on MTV (though the show abruptly switches to "The Animal Song" by The Europeans early on, then returns to Zappa for the tail end of "You Are What You Is", to which Butt-Head replies, "This is still on? That pisses me off!"). "You Are What You Is" contains references to other songs throughout his career and on the album itself, commonly referred as Zappa's "Conceptual Continuity". References include "Gimme a five dollar bill and an overcoat too" from "Wonderful Wino" on