When you look at a leaf you have the veins that run through the leaf and then there is the meat of the leaf, like in a Maple or Birch leaf.
(you; look; at a leaf) (you; have; the veins that run through the leaf; T:When you look at a leaf) (the veins; run; through the leaf)
you you the veins
look have run
at a leaf
the veins that run through the leaf T:When you look at a leaf
through the leaf