1. Functions of Plant Systems
Agri-science
Mr. Bailey

2. Imagine what the world would be like without plants
life on earth could not exist without plants
plants are directly or indirectly a source of food for all humans

3. What are the functions of the leaves?
Leaves make food for the plant
Leaves absorb light energy from the sun and carbon dioxide from the air and releases O2
Leaves also absorb water in the air (humidity)
Leaves also store the food that is created for the plant

4. What are the functions of the stem?
Transports water and nutrients to the leaves
Carries the food produced by the leaves to other parts of the plant
Supports the plant's leaves and flowers

5. Activity Time!!!!
Place a stalk of celery in a cup of red-colored water for 24 hours
Remove the stalks and observe how far the red water has traveled
Cut a cross-section of the stalk to inspect the location of the colored water

6. What are the functions of the roots?
Anchor the plant and hold it up
Absorb water and nutrients from the soil
Store food for longer periods of time so the plant can survive when it loses its leaves

7. What are the functions of the flowers?
Attract insects for pollination
Produce seeds and fruit
The site of plant reproduction

8. Week Long Assignment
Keep a record of the food you eat during a one week period
Identify all the foods on your lists that come from plants
Identify the part of the plant from which the food is made

9. Conclusion
Plants are a basic component of the food chain:

10. Exit Slip Identify the ways that plants get water.
Explain why trees can live in the winter when they have no leaves to produce photosynthesis.