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).
The Houston-Galveston-Brazoria Consolidated Metropolitan Statistical Area (Houston CMSA) consists of eight counties: Brazoria, Chambers, Fort Bend, Galveston, Harris, Liberty, Montgomery and Waller The Houston CMSA covers 8,778 square miles, an area slightly smaller than Massachusetts but larger than New Jersey. Founded in 1836, the City of Houston has a 2010 population of 2.1 million, according to the U.S. Census Bureau -- www.census.gov.