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).
Raymondville is a city in and the county seat of Willacy County, Texas, United States. The population was 9,733 at the 2000 census. It may be included as part of the BrownsvilleâHarlingenâRaymondville and the MatamorosâBrownsville metropolitan areas. Raymondville was formed in 1904 by Edward Burleson Raymond, a foreman of the El Sauz Ranch portion of the King Ranch and owner of the Las Majadas Ranch.