1. Structure and Function of Plants
Chapter 10B
Plant Functions

2. Water Movement Key steps in transporting water in plants:
Entrance through roots
Transport through xylem
Exit through leaves

3. Water Movement Water enters through root hairs
Epidermis
Vascular tissue located in center of root
Water and xylem interact

4. Water Movement Transpiration pulls water up the plant to the leaves
Stomata
Guard cells
Transpiration may stop at certain times

6. Gas Exchange Aerobic cellular respiration
Converts sugar produced by photosynthesis into usable energy for the plant
Uses oxygen
Produces carbon dioxide

7. Gas Exchange
Exchanging gases occurs in:
Stomata
Lenticels
Roots

8. Photosynthesis Occurs in chloroplasts Usually in leaves Palisade layer
Spongy layer
Air spaces

9. Sugar Sugar molecules contain stored energy
Sugar is transported to other parts of the plant
Some sugar is used as cellulose

10. Sugar Some sugar is stored as starch
Some plants convert sugar to lipids
Consumers eating plants use energy in those starches and oils

11. Growth Some plants have areas of rapid growth Tips of stems and roots
Vascular cambium
Cork cambium

12. Growth
Environment

13. Environmental Effects on Growth
Light

14. Environmental Effects on Growth
Wind

15. Hormones
Chemical substances that are made by plants and that affect how plant tissues grow

16. Growth
Hormones
Stem cuttings
Auxin