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.
It is powered by six turbofan engines and is the longest and heaviest airplane ever built, with a maximum takeoff weight of 640 tonnes. It also has the largest wingspan of any aircraft in operational service. Only one An-225 was ever built and the behemoth transporter is still in service today.