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.
Figures released by the Iowa Department of Veterans Affairs for the fiscal year 2010, Shelby County had a veteran population of 1,145. These figures placed Shelby County in the top half of Iowa's 99 counties. Total expenditures brought in to the county is $4,500,000.