Why are arterial blood vessels not visible?

Arterial blood vessels have a dense, elastic wall. They are practically invisible on the skin, as they are located under the layers of muscles and subcutaneous fat. This hidden location of the vessels is due to the fact that it is less likely to injure the artery. Any injury to an arterial vessel develops severe bleeding, which can lead to death. In the arteries, blood flows under high pressure, therefore, blood loss is always very large. Therefore, the arteries are evolutionarily located deep in the layers of muscles.