Tossups by Ati Tislerics and Notre Dame (Chris Hammer)
1. In humans, this organ is described as hemochorial; in other mammals it may be hemoendothelial or epitheliochorial. Among its specialized tissues are Nitabuch's membrane and Rohr's stria; numerous projections called villi contain many capillaries. One of its functions is as an endocrine gland, producing hormones that maintain the endometrium throughout gestation. For 10 points - identify this temporary organ that provides a developing fetus with oxygen and nutrients.
2. This ballet premiered in 1942, although it included some music from the composer's earlier ballet, Happiness. A 1957 Bolshoi production purged most of the Stalinist excesses of the original. Its adagio was used in the score of 2001, and the "Dance of the Young Girls" in Act 3 has been described as an American cowboy song with an Armenian twang. For 10 points - identify this ballet by Aram Khatchaturian, taking its title from its collective-farm heroine, best known for the rhythmically stirring "Sabre Dance".