The main function of veins in a leaf is transport of substances.
They transport water and sugar and other substances to various parts of the plant.
To identify the kinds of archetypal characters think about what the character does.
Archetypal characters are those who can be found all around the world, in various literatures. So, an archetype of a heroic characters, full of virtues and overall perfection, can be found in British, German, American, African, etc. literatures.