Cough due to Croup Anatomy
To better understand croup, it helps to understand the anatomy of the upper airway and larynx.
The larynx is part of the upper airway. It begins at the lower pharynx, and extends down to the trachea. From the outside, it is the area called the Adam's apple in the front of the neck.
The larynx consists of:
- Bjornson CL, Klassen TP, Williamson J, Brant R, Mitton C, Plint A, Bulloch B, Evered L, Johnson DW; Pediatric Emergency Research Canada Network. A randomized trial of a single dose of oral dexamethasone for mild croup. N Engl J Med. 2004 Sep 23;351(13):1306-13. 
- Custer JR. A randomized trial of a single dose of oral dexamethasone for mild croup. J Pediatr. 2005 Mar;146(3):434-5. 
- Griffin S, Ellis S, Fitzgerald-Barron A, Rose J, Egger M. Nebulised steroid in the treatment of croup: a systematic review of randomised controlled trials. Br J Gen Pract. 2000 Feb;50(451):135-41. 
- Johnson D. Croup. Clin Evid. 2004 Dec;(12):401-26.