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
My Name Is 'A' by Anonymous My Name Is 'A' by Anonymous My Name Is 'A' by Anonymous, also known by the alternate release titles of My Name Is 'A' and Alyssa: Portrait of a Teen Killer, is a 2012 thriller film that was directed and written by Shane Ryan. The film originally released on 19 October 2012 at the PollyGrind Film Festival, where it received an award for "Best Art House Film". The movie is loosely based on a 2009 murder by then 15-year-old Alyssa Bustamante, who killed her 9-year-old neighbor Elizabeth Olten. Alyssa (Katie Marsh) is a troubled young teen who spends her days