No valves exist between the anterior vena cava and the heart, and the heartbeat tends to cause movement within this blood vessel. Another vessel, the posterior vena cava, carries blood from the lower half of the body to the heart.
The 2016 Hereford, Texas, population is 15,021. There are 2,447 people per square mile (population density).
Bowie County, Texas (TX) County population in 2014: 93,275 (65% urban, 35% rural); it was 89,306 in 2000. County owner-occupied with a mortgage or a loan houses and condos in 2010: 12,380. County owner-occupied free and clear houses and condos in 2010: 10,351. County owner-occupied houses and condos in 2000: 23,449.