The superior vena cava is formed by the union of the left and right brachiocephalic veins (aka innominate veins) and terminates in the right atrium of the heart. It drains the superior part of the body and is one of the two largest veins in the body, the other being the inferior vena cava.
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Main article: Geography of Brazil
Brazil is characterised by the extensive low-lying Amazon Rainforest in the north, and a more open ...