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).
Randall County, TX has a population of 126,782 people with a median age of 35.4 and a median household income of $60,972. Between 2014 and 2015 the population of Randall County, TX grew from 124,862 to 126,782, a 1.54% increase and its median household income grew from $60,895 to $60,972, a 0.13% increase. The population of Randall County, TX is 75% White, 18.8% Hispanic, and 2.6% Black.