San Bernardino County Sheriff's Department Infographic Thursday, November 16, 2017 The San Bernardino County Sheriffâs Department is the law enforcement agency for the largest geographical county in the nation. The department serves over 2.1 million residents with 15 patrol stations and 3800 employees to ensure the quality and safety of those we serve...
Veins branch at their beginnings into tiny venules which join capillaries.  Veins have valves which stop the blood from flowing backward. Compared to the arteries, pressure in the veins is very low. The blood is being pushed through the arteries as the heart squeezes the blood out. This is not true for the veins. Blood is pushed through the veins when body muscles contract and squeeze the veins.
The walls of veins have three layers of tissues like the arteries but veins are much thinner and less elastic than arteries. 2. Veins have valves that help in the process of returning blood to the heart by preventing blood from flowing reverse.eins carry blood away from the heart, arteries carry blood toward the heart. (except for the pulmonary arteries) Veins have lower pressure flow and are compressible. arteries have higher pressure flow and do not normally compress. Oops!!! I did get that backwards!! Thanks for the correction.