1. Starter
What property of water allows plants to absorb water by pulling water molecules from the soil?
What structure do plant cells have that animal cells do not?
What type of organisms occupy the first trophic level on food pyramid?
What type of species interaction is it when a bee pollinates a flower?
Are plants eukaryotic or prokaryotic?

2. There are 4 main organs of a plant.
Do you know what they are?

3. Four Main Organs of a Plant
Flowers – reproductive organs
Leaves
Stems
Roots

4. Plant Organs

5. What are the functions of these shoes?
When would these shoes be worn?

6. What structures (parts) help the shoes to fulfill their function?

7. Objective
I can diagram and label the structures of plant organs and describe the organ’s function.

8. Structure & Function of Organs
Structure: the arrangement and relations between the parts of an organ
Function: an activity or purpose of the organ

9. Root Function Absorbs water and nutrients Stores nutrients
Anchors the plant to the ground

10. Diagram & Label the Root
Root hairs
Vascular cylinder
Zone of elongation
Root tip

11. Root Hairs
Root hairs: tiny projections from the outer surface of a root
Penetrates the spaces between soil particles
Produces a large surface area which water can be absorbed

12. Vascular Cylinder
Vascular cylinder: center of the root which holds the vascular tissue – xylem and phloem
Stores water and nutrients

13. Zone of Elongation
Zone of elongation: the cells in the area above the root tip
The cells stretch by taking in water
The growth pushes the root further into the soil

14. Root Tip
Root tip: structure that protects a root as it forces its way through the soil

15. Stem Function Support system for the plant body
Transports nutrients and water
Produce leaves, branches, and flowers

16. Diagram & Label the Stem
Vascular bundle
Pith

17. Vascular Bundle The vascular bundle holds veins of xylem and phloem.
Xylem: transports water throughout the plant
Phloem: transports nutrients throughout the plant
Phloem
Cambium
Xylem

18. Vascular Bundle
Vascular cambium: produces new layers of vascular tissue causing the stem to become thicker and thicker – giving plants support and structure
Phloem
Cambium
Xylem

19. Pith
Pith: stores and transports nutrients through the plant

20. Leaf Function
Photosynthesis

21. Leaf Function Thin leaves provide:
maximum surface area to collect sunlight
minimal distance to carbon dioxide and water

22. Diagram & Label the Leaf
Cuticle
Vein
Guard Cell
Stomata

23. Cuticle
Barrier that prevents evaporation of water

24. Veins
Inside each vein strands of xylem which transport water and strands of phloem which transport sugars.

25. Guard Cells & Stomata
Stomata: gaps on the leaf surface that open and close allowing water and gases to enter & leave the plant
Guard cell: control gas exchange – swollen with water they open stomata

26. Flower Function Flowers are the plant’s reproductive organs.
Flowers are usually both male and female.

27. Diagram & Label the Flower

28. The female reproductive structures are called carpels and have 3 parts.
The stigma is sticky and is where the pollen attaches.
The style is the long tube that attaches the stigma to the ovary. The pollen will travel down this tube to the ovary.
The ovary is the enlarged base of a carpel which stores eggs until they are fertilized and develop into seeds.

29. The male reproductive structures are called the stamens and have 2 parts.
The anther produces pollen. Pollen produced by the anther is carried by insects or other animals to the pistil of another.
The filament supports the anther.

30. There will be a quiz on parts and function of the flower next class.