Trachea Diffusion of oxygen and carbon dioxide takes place across the walls of the smallest tubes, called tracheoles, which penetrate tissues and even indent individual cells. Gas may be conducted through the respiratory system by means of active ventilation or passive diffusion. Unlike vertebrates, insects do not generally carry oxygen in their haemolymph. This is one of the factors that may limit their size. A tracheal tube may contain ridge-like circumferential rings of taenidia in various geometries such as loops or helices. Taenidia provide strength and flexibility to the trachea. In the head, thorax, or abdomen, tracheae may also be connected
What What (In the Butt) What What (In the Butt) "What What (In the Butt)" is a viral video created by Andrew Swant and Bobby Ciraldo for the song of the same name by Samwell. It is known for its numerous camp references to homosexuality and anal sex. The lyrics of the song, a production of Mike Stasny, mostly revolve around the title. The video was made in Milwaukee, Wisconsin and uploaded on Valentine's Day 2007 to YouTube. As of March 2016, the video had over 60 million views. On 5 March 2007, with regard to the Christian imagery in the video, Samwell said, in