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
More Is More More Is More "More Is More" is a song performed by American pop recording artist Heidi Montag, and was released on April 3, 2009. The uptempo dance-pop song is lyrically about going to a club with friends and receiving attention from men. The song debuted at number 50 on "Billboard" Hot Dance Club Songs chart in July 2009 and peaked at number 27, becoming Montag's first and only charting single to date. "More is More" is an uptempo dance-pop song that makes heavy use of synthesizers, especially the auto-tune software to alter Montag's voice. Lyrically, the song is about going