The pulmonary arteries carry blood from the heart to the lungs, to drop off carbon dioxide and pick up oxygen. There are two pulmonary arteries, one going to the left lung and one to the right.
Albi Cathedral. The Cathedral Basilica of Saint Cecilia (French: Basilique CathÃ©drale Sainte-CÃ©cile d'Albi), also known as Albi Cathedral, is the most important Catholic building in Albi, France, and the seat of the Roman Catholic Archbishop of Albi (in full, Albi-Castres-Lavaur).
RICHARD BLYSTONE, CNN CORRESPONDENT (voice-over): The grand mosque at Djenne, Mali, is not only the biggest mud building in the world, it's a monument to a golden age seven centuries ago, when the empire of Mali was a center of wealth, culture, learning and trade, its influence felt over most of West Africa.