Session 3 Notes

I.a. refers to the internal structures

I.b. refers to the external

appearance

II. Primary Growth

a. up and down

i. apical meristem

PRIMARY GROWTH

Main Functions of a leaves

1.Photosynthesis

2.Water Evaporation

3.Gas Exchange

4.Storage – ex. Spinach (yum…)

Stem

Petiole

Blade

LEAVES - Morphology

LEAVES - Anatomy

Top of Leaf

Cuticle

Epidermis

Bottom of LeafGuard Cell

Parenchyma

Stoma

Vein

1. Cuticle

2. Parenchyma

3. Stoma

4. Guard Cells

5. Vascular Bundle (Vein)

Main Functions of a stems

1.Support

2.Photosynthesis

3.Helps Transport water and nutrients

4.Storage – ex. Asparagus (yum…)

Axillary Bulb

Node

Leaf Primordia

Apical Meristem Region

1. Apical Meristem

2. Axilary Bud

STEMS - morphology

STEMS - Anatomy

Epidermis

Cortex (parenchyma)

Phloem

Pith (parenchym

a)

Vascular Bundles

Xylem

1. Xylem

2. Phloem

Main Functions of a root

1.Below ground support (anchor)

2.Absorption of water and minerals from soil

3.Helps Transport water and nutrients through xylem

4.Storage – ex. Carrots are roots and store sugar making them sweet (yum…)

ROOTS - Morphology

ROOTS - Anatomy

II. Secondary Growth

a.Increase in Girth (thickness)

i.1. Apical Meristem

b. Lateral Meristem

i. Vascular Cambium

WOOD

WOODvi. In Trees:

1. Wood

2. Bark