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.
Beaconsfield, Iowa. The Community Building is the birthplace of the Hy-Vee grocery store chain. Beaconsfield is a city in Ringgold County, Iowa, United States. The population was 15 in the 2010 census, an increase from 11 in the 2000 census. In the 2000 census Beaconsfield had the dubious distinction of being the least populated incorporated city in Iowa; with the increase in the 2010 census it now shares that distinction with Le Roy, Iowa.