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Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

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The trachea develops from the primitive oesophagus within the floor of the pharynx. In the ventrolateral wall of the oesophagus, a distinct laryngotracheal groove develops. The internal edges of this groove move towards the midline and eventually fuse. This delineates the original tube into ventral trachea and caudal oesophagus.

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