1. Growth and Development of different organisms
National 5 Biology
Key Area 6:
The Need for Transport
(a) Plant Transport Systems
National 4 Biology
Key Area 4
Growth and Development of different organisms

2. Learning Outcomes for Topic 6 – Part A
Explain why plants need a transport system
Name the 2 transport systems in plants
Give the function of each of the 2 plant transport system
Be able to identify 7 structures in a leaf
State the function of each structure
State what is meant by ‘transpiration’
Describe the process of transpiration in a plant

3. Leaf structure

4. TASK: Mapping from Memory 
INSTRUCTIONS
Get into groups of 3
Decide which person is going to be the scribe – THEY ARE THE ONLY PERSON ALLOWED TO WRITE
The other group members (runners) must take it in turns to go up the hidden leaf structure sheet and try to remember as much as possible in 30 seconds
They then have to explain what was on the sheet to the scribe
Repeat for the 2nd ‘runner’ (keep going for 5 minutes)
The scribe can only see the hidden sheet after the task is over
The runners are NOT allowed to write!
RESOURCES FOR EACH GROUP:
Pen/pencil
Leaf structure diagram

5. Waxy cuticle
Vein or vascular bundle
Air Space
Guard Cell
Stoma

6. Protective layer of cells which is transparent to let light through.
Structure
Description
Upper epidermis
Palisade Mesophyll
Spongy Mesophyll
Vein
Lower epidermis
Guard Cells
Stomata
Protective layer of cells which is transparent to let light through.
Rectangular cells which contain many chloroplasts for photosynthesis.
Loosely packed chloroplast containing cells with air spaces between them to allow gas exchange
Part of transport system. Contains xylem and phloem.
Protective layer of cells on the underside of a leaf. Made up of epidermal cells, guard cells and stomata.
Pairs of cell which change shape to open or close the stomata
Pore on the lower leaf surface which allows entry of CO2 and exit of water and O2

7. Stoma
Stomata
Guard cells
stoma

8. Stomata (plural) Stoma (singular)
Each stoma is surrounded by a pair of guard cells.
When guard cells are turgid (swollen) the stoma opens – day time
When guard cells are flaccid (shrunken) the stoma closes – night time.
Oxygen LEAVES the cell by diffusion
Water LEAVES the cell by evaporation
Carbon dioxide ENTERS the cell
Bye bye!
Bye bye!
Come on in!