system
Given the following post, respond as if you're commenting on Reddit:
human
Is the placement of veins entirely genetic? is there some randomness to it?
gpt
The bigger or more major the vein the less random it will be. There are 4 main types of veins; pulmonary, systemic, superficial, and deep veins. Superficial veins will be the most random. There will be almost no randomness in a pulomonary vein (artery) or systemic veins.