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).
Bexar County, Texas. Bexar County (/bÉÉr/ bair, /ËbeÉª.Ér/ BAY-Ér) is a county of the U.S. state of Texas. As of the 2010 census, the population was 1,714,773, and a 2013 estimate put the population at 1,817,610. It is the 17th-most populous county in the nation and the fourth-most populated in Texas.