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Passerine birds produce song through the vocal organ, the syrinx, which is composed of bilaterally symmetric halves located where the trachea separates into the two bronchi. Using endoscopic techniques, it has been observed that song is produced by air passing between a set of medial and lateral labia on each side of the syrinx. [1]
The trachea are covered in partly ossified rings known as tracheal rings. Tracheal rings tend to be complete, while the bronchial rings are C-shaped and the unossified part has smooth muscles running along them. The trachea are usual circular or oval in cross section in most birds but are flattened in ibises.
The trachea is no more than 4 mm in diameter during the first year of life, expanding to its adult diameter of approximately 2 cm by late childhood. [2] [3] The trachea is more circular and more vertical in children compared to adults, [3] varies more in size, and also varies more in its position in relation to its surrounding structures. [2]
1. ‘Obsessive about the sounds’ You all come from different backgrounds and represent different traditions. But one thing that unites the five of you, I think, is a real devotion to craft.
"Feel Inside (And Stuff Like That)" is a 2012 charity single and comedy song by New Zealand comedy duo Flight of the Conchords. The Conchords are joined by a charity supergroup made up of New Zealand singers. Proceeds of the song benefited the New Zealand children's health research charity Cure Kids. [1]
Image shows early occurrence of tracheal deviation. Tracheal deviation is a clinical sign that results from unequal intrathoracic pressure within the chest cavity.It is most commonly associated with traumatic pneumothorax, but can be caused by a number of both acute and chronic health issues, such as pneumonectomy, atelectasis, pleural effusion, fibrothorax (pleural fibrosis), or some cancers ...
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Pulmonary aspiration is the entry of solid or liquid material such as pharyngeal secretions, food, drink, or stomach contents from the oropharynx or gastrointestinal tract, into the trachea and lungs. [1]