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==Structure==
 
==Structure==
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*The trachea contains numerous rings of [[Bones and Cartilage - Anatomy & Physiology#Hyaline Cartilage|hyaline cartilage]] which are C-shaped, being dorsally incomplete, connected to eachother by elastic connective tissue. The ends of the incomplete rings are joined by smooth muscle - ''Trachealis'' muscle.
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*The trachea contains numerous rings of [[Bones and Cartilage - Anatomy & Physiology#Hyaline Cartilage|hyaline cartilage]] which are C-shaped, being dorsally incomplete, connected to each other by elastic connective tissue. The ends of the incomplete rings are joined by smooth muscle - ''Trachealis'' muscle.
 
**The structural conformation of the trachea prevents collapse due to traction forces, whilst allowing it to adjust in length and diameter as the neck moves and the [[Diaphragm - Anatomy & Physiology|diaphragm]] contracts.  
 
**The structural conformation of the trachea prevents collapse due to traction forces, whilst allowing it to adjust in length and diameter as the neck moves and the [[Diaphragm - Anatomy & Physiology|diaphragm]] contracts.  
 
*The trachea's walls are made up of a number of layers: Inner Mucosa, Fibrocartilaginous middle layer, and adventitia (in the neck) or serosa (in the thorax).
 
*The trachea's walls are made up of a number of layers: Inner Mucosa, Fibrocartilaginous middle layer, and adventitia (in the neck) or serosa (in the thorax).
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