1. Science- Plants
Part 2: Roots & Stem

2. Three main jobs of roots
Support: Keeps the plant in the ground and helps hold up the plant
Absorption: Take water and minerals from the soil
Storage: Some roots can store food (carrots & potatoes)

3. Types of Roots – 2 major types of roots
Fibrous Root
A bunch of small roots that are about the same size

4. Types of Roots – 2 major types of roots
Tap root
Tap roots have one MAIN root with smaller roots that branch off of it

5. Inside of a root
Ground Tissue

6. Root Hairs

7. Root Hairs
Root hairs help the plant find water and bring water to the plant
Water travels from the soil to the root hairs to the larger roots to the stem

8. Root Hairs

9. You can eat Roots????? Roots have been eaten for thousands of years
Food / nutrients are stored in roots
This is called STARCH
Examples: carrots, potatoes, sweet potatoes, ginger, etc.

12. The Stem You can think of the stem as the HIGHWAY of the plant
The stem connects the leaves and roots
Water and nutrients move UP the stem to the leaves
Glucose and nutrients move DOWN the stem to the roots

13. Types of Stems- 2 major types of Stems
Herbaceous stem
Soft
Green
Flexible
Make a new stem each year

14. Types of Stems- 2 major types of Stems
Woody stem
Thick
Not very flexible
Grows wider each year

15. Xylem & Pholem
Xylem and Pholem are special tubes that move the materials in a plant
They are the highway of the plant

16. Xylem & Pholem
Xylem
Carries water and nutrients UP from the roots to the leaves

17. Xylem & Pholem
Pholem
Moves the nutrients and glucose (food for the plant) throughout the plant in ALL directions

18. Xylem & Pholem