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.
Clarinda: Iowa: National: Population: 5,490: 3,078,116: 314,107,084: Population density (sq mi) 1,059: 55: 91: Median age: 41.0: 38.0: 37.4: Male/Female ratio: 1.2:1: 1.0:1: 1.0:1: Married (15yrs & older) 56%: 60%: 55%: Speak English: 96%: 93%: 79%: Speak Spanish: 3%: 4%: 13%