The Inferior vena cava-just like the Superior vena cava -, returns blood to the heart. When blood is returning to the heart, that blood is already circulated in the body, therefore it is already downloaded the oxygen to the body tissues, and picked up the carbon dioxide from them.
Harrington is located in Kent County in Delaware. 1  Population: 3,582. 2  Area: 2.75 sq. miles Land Area: 2.75 sq. miles. 3  Population Density: 1,300.65 people per sq. mile.  Elevation: 49.54 1  ft. Time Zone: Eastern Standard Time (GMT 2  -5) Daylight Savings:  Yes.
Population of New Castle County. Last official estimated population of New Castle County was 538,873 (year 2014)[1]. This was 0.169% of total US population and 57% of total Delaware state population. Area of New Castle County is 494.0 miÂ² (=1279.5 kmÂ²), in this year population density was 1,090.83 p/miÂ². If population growth rate would be same as in period 2010-2014 (+0.02%/yr), New Castle County population in 2017 would be 539,169 .