From the vena cava (superior and inferior), the blood enters the heart (right atrium), is pumped into the right ventricle, and then pumped into the lungs (through the Pulmonary Arteries), where carbon dioxide is exchanged for oxygen.
Harlan, Iowa. Harlan is a city in Shelby County, Iowa, United States, along the West Nishnabotna River. The population was 5,106 at the 2010 census. It is the county seat of Shelby County.
Clinton County, Iowa (IA) County population in 2014: 48,051 (68% urban, 32% rural); it was 50,149 in 2000. County owner-occupied with a mortgage or a loan houses and condos in 2010: 9,307. County owner-occupied free and clear houses and condos in 2010: 5,388.