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
By Any Name John, was released in early 2006 and was well received by critics and as well as fans of John herself. Much like the film, the book follows the story of Dr Elizabeth Santer who is desperately trying to help the man known as John West rediscover his memory despite warnings that West might be dangerous and is suspected of Terrorist activities. By Any Name By Any Name is a 2016 British action thriller film, that has won two awards at the 2016 North Wales International Film Festival and is based on the book of the same name by Catrin Collier.