Transport in Plants

• The xylem transports water from the roots to the leaves.
• Lignin: a complex organic polymer deposited in the cell walls of many plants, making them rigid and woody.
• Guard cells are found in the stomata and control the opening and closing of the stomata.
• Stomata are small openings on the surface of plant leaves that allow gases such as carbon dioxide (CO2) and oxygen (O2) to enter and exit the leaf.
• Phloem tissue carries sugars produced during photosynthesis throughout the plant.