Tetrapod probably had a three-chambered heart, as do modern amphibians and reptiles, in which oxygenated blood from the lungs and de-oxygenated blood from the respiring tissues enters by separate atria, and is directed via a spiral valve to the appropriate vessel — aorta for oxygenated blood and pulmonary vein for deoxygenated blood. The spiral valve is essential to keeping the mixing of the two types of blood to a minimum, enabling the animal to have higher metabolic rates, and be more active than otherwise. The difference in density between air and water causes smells (certain chemical compounds detectable by chemoreceptors) to
The Body, the Blood, the Machine Hutch Harris and Kathy Foster. The Body, the Blood, the Machine The Body, the Blood, the Machine is the third studio album by American indie rock band The Thermals. The album was released on August 22, 2006 on Sub Pop Records, and was produced by Fugazi's Brendan Canty. According to the band's official website, "the album tells the story of a young couple who must flee a United States governed by fascist faux-Christians." The music review online magazine "Pitchfork" placed "The Body, the Blood, the Machine" at number 186 on their list of top 200 albums of the 2000s. All