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.
Because veins are carrying oxygen-poor blood back to the heart they have a much less strong blood pressure than arteries that carry blood from the heart. Arteries have to have thicker walls because of the greater pressure on them.So it is easier to use veins, and less dangerous.f someone were to try to draw blood from one of your arteries, it would literally squirt out every time your heart beats. Plus, arteries are typically deeper within your body than veins (veins are much easier to get to when taking blood). Source(s): Nursing major.