Xylem and phloem
Xylem and phloem tissue make up the transport cells of stems. The direction of water and sugar transportation through each tissue is shown by the arrows.
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"Jesuit Virtual Learning Academy, 1.4.2 Plant Tissues. November 15, 2013."
http://cnx.org/content/m43140/latest/
OpenStax CNX
CC BY 3.0.