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.
Tel: 712-755-5137. Harlan is located in southwest Iowa, approximately 11 miles north of Interstate 80 (Exit No. 41) between Des Moines, Iowa and Omaha, Nebraska at the junction of US Highways 59 and 44.