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 Is This? This’ song, “Mind My Have Still I” from their "Squeezed", was also featured on the soundtrack to the movie "The Wild Life". Their second album, which featured a cover of the Spinners hit “I'll Be Around”, was produced by Todd Rundgren, who also played Fairlight Synthesizer on the record. “I'll Be Around” was released as a single and video; it peaked at No. 62 on the Billboard Hot 100. What Is This? What Is This (known prior to 1980 as Anthym) was a rock band that originated in Fairfax High School in California and would play numerous shows along the