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
What Is Love? (Twice song) What Is Love? (Twice song) "What Is Love?" (stylized as "What is Love?") is a song recorded by South Korean girl group Twice, the lead single of their fifth extended play of the same name. The song was released on April 9, 2018 by JYP Entertainment and distributed by Iriver. "What Is Love?" was written and composed by Park Jin-young, who previously produced "Signal", and it was arranged by Lee Woo-min "collapsedone", who co-produced "Knock Knock" and "Candy Pop". According to JYP Entertainment, the song is about "the love girls would dream about or imagine after learning about it through