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.
The 2016 Clive, Iowa, population is 17,419. There are 2,294 people per square mile (population density). The median age is 39.7. The US median is 37.4. 62.82% of people in Clive, Iowa, are married. 6.84% are divorced. The average household size is 2.65 people. 38.53% of people are married, with children. 13.10% have children, but are single.