Trachea annular ligaments of trachea. The epiglottis closes the opening to the larynx during swallowing. The trachea develops in the second month of development. It is lined with an epithelium that has goblet cells which produce protective mucins (see "Respiratory epithelium"). An inflammatory condition, also involving the larynx and bronchi, called croup can result in a barking cough. A tracheotomy is often performed for ventilation in surgical operations where needed. Intubation is also carried out for the same reason by the inserting of a tube into the trachea. From 2008, operations have experimentally transplanted a windpipe grown by stem cells, and
What is this Feeling? and new?/I felt the moment I laid eyes on you/My pulse is rushing/My head is reeling/My face is flushing/What is this feeling?/Fervid as a flame/Does it have a name?"). The irony comes in when phrases traditionally used for love songs are revealed to be expressing hate. When Galinda and Elphaba describe each other, Galinda complains about Elphaba being "utterly impossible to describe", while Elphaba simply calls Galinda "blonde". At the end of the song, Elphaba scares Galinda, by saying "Boo", with Galinda letting out a high-pitched squeal. What is this Feeling? "What is this Feeling?" is a song from the