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.
Population by County in Iowa There are 99 counties in Iowa. This section compares Montgomery County to the 50 most populous counties in Iowa. The least populous of the compared counties has a population of 15,606. Total Population by County#11