1. What two types of tissues make up the vascular system in plants?
Xylem and Phloem

2. What is xylem?
Water and dissolved minerals move up from the roots to the rest of the plant through xylem.
What are the two types of cells that make up xylem?
Tracheid cells and vessel elements.

4. Tracheid Cells and Vessel Elements
Long and narrow.
Water flows from cell to cell through openings in the thick cell walls.
Vessel Elements:
Shorter and wider than tracheids.
Both cells must die before water moves through them.

7. How do plants move water through xylem?
Cohesion-tension theory proposes that the physical properties of water allow the rise of water through the plant.
What does this mean?
Cohesion: attraction btw molecules of the same substance.
Adhesion: attraction btw molecules of different substances.

8. For Example.....

9. Give an example cohesion and an example of adhesion.

10. So Back to the Cohesion-Tension Theory
Simply put..... cohesion and adhesion create tension that moves water upward in xylem.
There is one more force that drives the movement of water in plants transpiration

11. Plant Sweat Transpiration is how plants sweat.
Release of vapor through the pores of the skin or stomata of plant tissue.
What role does evaporation play?

13. Phloem Phloem carries sugars from photosynthesis throughout the plant,
Phloem tissue is alive.
Made of cells called sieve tube elements.

14. Sieve Tube Elements
Get their name from small holes in the end walls of their cells.
As they grow these cells lose their nuclei and ribosomes.

15. How does food move through phloem?
The pressure-flow model explains how food, or sap, moves through a plant.
The food moves from an area of high pressure to an area of low pressure