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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Brazil is the only Portuguese-speaking nation in the Americas. About 80% of all Brazilians belong to the Roman Catholic Church; most others ...