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
Isa (name) Isa (name) Isa is a unisex given name originating from a variety of sources. The name is most commonly derived from the [classical Arabic] "‘Isa", an Arabic translation of Jesus, itself having a Hebrew origin. However, it is not the only translation; it is most commonly associated with Jesus as depicted in Islam, and thus, commonly used by Muslims. Meanwhile, Arabic-speaking Christians would use "Yasū‘", a more phonetic translation of Jesus. The origin of the Quranic "Isa" is complex and is detailed below. Isa was also used in the Frisian (Old Germanic) language for both males and females and was