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).
Titus County is a county located in the northeastern region of the U.S. state of Texas. As of the 2010 census, its population was 32,334. Its county seat is Mount Pleasant. The county is named for Andrew Jackson Titus, an early settler. Titus County comprises the Mount Pleasant, TX Micropolitan Statistical Area.