1. Plant Structure & Function
I. The Vascular Plant Body
Tissues:
dermal tissue – the protective outer layer of a plant; forms the epidermis where gas is exchanged through the stomata
ground tissue – the inside of the non-woody parts; conducts photosynthesis
vascular tissue – contains xylem (transports water & nutrients) and phloem (transports organic compounds - food)

2. Plant Tissues

3. Roots:
root hairs – an extension of the epidermis of a root that increases the root’s surface area for absorption
root cap – the protective layer of cells that covers the tip of a root

4. Root Hairs and Root Cap

5. Leaves: lamina – (blade) flatten portion of leaf
cuticle – outer waxy coat that covers the upper and lower epidermis of the leaf; protects it from damage and drying out
apex – tip of blade
base – bottom of blade
petiole – a stalk that attaches the leaf to the stem
stipules – small paired appendages at the
base of the petiole
midrib – the central rib or vein of a leaf
veins – vascular structures containing xylem & phloem that run throughout the leaf

6. Parts of a Leaf Apex Lamina Vein Margin Midrib Petiole (leaf stalk)
Stipules
Base

7. Simple vs. Compound Leaves
Node

8. Internal Structure of a Leaf

9. II. Transport in Plants A. Movement of Water
1. Xylem – transports water and
nutrients
2. Transpiration – the loss of water
vapor through the stomata of a leaf

10. B. Movement of Organic Compounds 1. Phloem – transports
(food)
2. Translocation – the
movement of
through a plant
from a source to a
sink
Source
Sink

11. Stems:
non-woody stems – flexible , usually green stems; herbaceous plants have non-woody stems
woody stems – covered by cork which protects them from physical damage and water loss
bark – made of layers of cork and phloem

12. Bark on Woody Stems
Leaves connect
to the stems of plants at the . . .