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 a Beautiful Name on 6 January 2017, as the lead single from their 25th live album, "Let There Be Light" (2016). "What a Beautiful Name" was composed in December 2015 in Sydney, Australia, for the upcoming Hillsong Conference, the annual church gathering. The scriptural foundation of the song can be found in , and . According to sheet music published at Sheetmusicdirect.com by Hillsong Publishing, "What a Beautiful Name" is a slow tempo of 68 beats per minute. Written in common time, the song is in the key of D major. Brooke Ligertwood's vocal range spans from A to B during the song.