Trachea act as a resonator to amplify sound. In some birds, the tracheal rings are complete, and may even be ossified. In amphibians, the trachea is normally extremely short, and leads directly into the lungs, without clear primary bronchi. A longer trachea is, however, found in some long-necked salamanders, and in caecilians. While there are irregular cartilagenous nodules on the amphibian trachea, these do not form the rings found in amniotes. The only vertebrates to have lungs, but no trachea, are the lungfish and the "Polypterus", in which the lungs arise directly from the pharynx. The word "trachea" is used to
Errors of the Human Body screening, Sheean himself said, "The film is about a breakdown in communication, both on the surface in the characters and internally with the cells." Errors of the Human Body Errors of the Human Body is a 2012 psychological thriller directed by Eron Sheean and starring Michael Eklund. Dr. Geoff Burton (Eklund), a brilliant genetics researcher, is invited to a lab in Dresden, only to discover a lethal virus is being created, which he may have unintentionally caused and be its first victim. This mystery is set against Dr. Burton trying to find redemption and peace from a past haunted by