The long trachea of a rabbit contains:

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(D) The trachea (windpipe) is a tube that extends through the neck and into the thorax. In rabbits,as in other mammals,the trachea is supported by $C$

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Incomplete tracheal cartilage

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(D) The trachea (windpipe) is a tube that extends through the neck and into the thorax. In rabbits,as in other mammals,the trachea is supported by $C$-shaped rings of hyaline cartilage. These cartilaginous rings are incomplete dorsally,meaning they do not form a complete circle. This structure allows the esophagus,which lies behind the trachea,to expand during the passage of food.

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