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.
Airbus A340-500. The A340-500 is the world's second longest range airliner, allowing for a maximum distance of 16,670km (9,000nmi) with flight durations of up to 19 hours. The A340-500 took to the sky for its first flight in February 2002 and made its debut with Emirates in December 2003.
The plane will have the widest wingspan of any aircraft: 235 feet, 5 inches (71.8 meters), making it wider than four 53-foot (16-meter) semi-truck trailers parked end to end. It is so big, Boeing has developed hinges on its wingtips. The hinges will fold up, allowing the plane to shorten its wingspan when it's rolling across airport taxiways, the first design of its kind on any commercial airliner.