1. Stem and Leaf Structures

2. Xylem
Tubelike structures that carry water from the roots to the rest of the plant
Made of specialized long, thin cells stuck end to end
The water transportation system for most land plants

3. Vascular System
A vascular system transports water throughout a plant and the leaves regulate the flow of water through a plant.

4. Stomates Structures that look like little mouths on leaves
Pores (openings) in the leaves that can open and close
Most stomates are found on the bottom of leaves
Control water leaving the plant

5. Guard Cells
Cells around the stomates
Control the size of the opening

6. Think about it questions
Why would most stomates be found on the bottom of the leaf?
Why are the stomates on a wilted leaf closed?