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 More Can I Say What More Can I Say "What More Can I Say" is a song from rap artist Jay-Z's studio album "The Black Album". It was released as a street single simultaneously as the official single "Change Clothes". It premiered on Hot 97 on October 22, 2003 and was the first track from "The Black Album" to be heard by the public. The song includes additional vocals from Vincent "Hum V" Bostic and was produced by The Buchanans. The intro has a sampled monologue by Russell Crowe from the film "Gladiator", the song also samples "Something for Nothing" by MFSB from their