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 to the club with friends, drinking and receiving male attention. In the second half of the song, the lyrics switch from being club-oriented to more sexual. On the "Billboard" issue dated July 1, 2009, "More Is More" debuted on the Hot Dance Club Songs chart at number 50, becoming Montag's first song to chart, despite not being released as a single. After five weeks on the chart, it peaked at number 27. More Is More remix promo CD More Is More "More Is More" is a song performed by American pop recording artist Heidi Montag, and was released on April