This is also a good opportunity to discuss important travel health issues including safe food and water, accidents, sun exposure and insect bites. Many of the problems experienced by travellers cannot be prevented by vaccinations and other preventive measures need to be taken.
Age and genetics. As you get older, the veins in your hands may become more visible. Additionally, some peopleâs veins are naturally more visible. This could be due to skin pigmentation, body fat distribution, or a variety of other genetic factors. In most cases visible veins in hands are not a sign of a medical condition, or of any other problems.
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.