Trachea to prevent swallowed matter from entering the trachea. In the fourth week of development of the human embryo as the respiratory bud grows, the trachea separates from the foregut through the formation of tracheoesophageal ridges which fuse to form the tracheoesophageal septum and this separates the future trachea from the oesophagus and divides the foregut tube into the laryngotracheal tube. Before the end of the fifth week, the trachea begins to develop from the laryngotracheal tube which develops from the laryngotracheal groove. The first part of the cephalic region of the tube forms the larynx, and the next part forms
The Body (Buffy the Vampire Slayer) to mortality and human connections, is childlike in her innocence and questions. Xander's anger and Anya's confusion allow them to be mothered somewhat by Willow, who needs to take care of someone. Dawn is deeply in denial, unable to understand that the woman she thought she had known all her life was gone. Tara, who has gone through the ordeal before, represents the acceptance phase, soothing and helping the others to work through what they are experiencing. Buffy toward the end also begins to see acceptance when she tells Dawn that the body in the morgue is not their mother;