part_of part of part of results in formation of results in formation of anatomical entity animal organ formation anatomical structure formation involved in morphogenesis trachea morphogenesis trachea formation The process pertaining to the initial formation of a trachea from unspecified parts. The process begins with the specific processes that contribute to the appearance of the discrete structure and ends when the trachea is recognizable. The trachea is the portion of the airway that attaches to the bronchi as it branches. biological_process GO:0060440 respiratory airway