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).
Projected Texas Population by County, 2015; FIPS County County Name Total Anglo Black Hispanic Other; 1: 1: Anderson: 60,367: 35,964: 12,507: 10,506: 1,390: 3: 2: Andrews: 16,133: 7,244: 204: 8,340: 345: 5: 3: Angelina: 90,596: 54,756: 13,456: 20,032: 2,352: 7: 4: Aransas: 24,738: 16,999: 268: 6,523: 948: 9: 5: Archer: 9,502: 8,491: 34: 810: 167: 11: 6: Armstrong: 1,969: 1,785: 11: 133: 40: 13: 7: Atascosa: 50,278: 17,430: 278: 31,923: 647: 15: 8: Austin: 32,238: 19,792: 3,049