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
Moore Is More and cluttered dance-pop of "On and On" (featuring a guest spot from Da Brat) to a magnetic version of the '50s torch song "Cry Me a River." Unsurprisingly, the latter is a better fit, and the songs closer to it in style -- more refined, deeply felt, and pared down to suit Moore's still-remarkable voice -- are what make the album attractive". Moore Is More Moore is More is the sixth studio album by American R&B artist Chanté Moore. It was released on July 30, 2013, through Shanachie Records. The album featured production from Midi Mafia, Kwamé, Chris Davis and