the right subclavian artery branches off the brachiocephalic artery. the left subclavian artery is the third branch off the aortic arch. the internal carotid arteries arise from the common carotid arteries and supply blood to the brain and orbits.
The Airbus A350-900 is the tenth longest range airliner reaching a maximum distance of up to 14,350km (8,250nmi). It is one of the variants in the A350 XWB family. The aircraft can accommodate 315 passengers in a two-class seating configuration.
Most general aviation planes use propellers and must cruise at lower altitudes. For example, a Cessna Skyhawk has a maximum operating altitude of 13,500 feet. Planes that fly at higher altitudes must have pressurized cabins to keep the pilots and passengers safe and comfortable.