(Sarah of the Clue Crew points to a diagram of the heart on the monitor.)  Deoxygenated blood is carried back to the heart via the body's two largest veins, the superior & inferior this
...... vessels carry nutrientrich oxygenated blood from the arteries and arterioles to
... [DOC] [TLE] Google+ [PAR] The tale of two ancient bison populations has revealed clues about how early .... 
Saying back to her in a frustrated tone.