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
Name Is 4Minute Name Is 4Minute Name Is 4Minute is the fourth mini-album by South Korean girl group 4minute, released on April 26, 2013. It features the lead single "What's Your Name?", which became the group's most successful single after peaking at number one on the Gaon Singles Chart and being one of the best selling singles of the year. On February 4, 2013, Cube Entertainment announced that 4Minute would release new material in the first half of the year. It was further explained that their new music would more closely resemble their debut sound, more "groovy and powerful" according to their record