👉 Administrator veins are the large, easily accessible veins found in the upper arms, thighs, and neck of an adult human. They are typically used for injections and other medical procedures because they are larger and less likely to cause pain or damage compared to smaller veins. The veins are located closer to the surface of the skin, making them easier to locate and puncture with a needle. However, they can be more prone to complications like hematoma formation or infection if not properly treated.