Plants Structure Leaves stem roots Leaves Function of
- Slides: 20
Plants Structure – Leaves stem roots
Leaves
Function of leaves § Trap light energy for photosynthesis Producing sugar from photosynthesis § Exchange of gases – oxygen and carbon dioxide
Structure Wide Helps to catch more light energy Thin Help get carbon dioxide from bottom to top of leaf for photosynthesis
Leaf structure Greener on top CO 2 gets in here
Leaf diagram – palisade layer Most chlorophyll CO 2
Leaf cell palisade Position? Upper surface of leaf Features? Box shape Chloroplasts Function? Photosynthesis
Gas exchange § Leaves are designed to allow carbon dioxide to get to the main chlorophyll layer at the top of the leaf § They have small holes called stomata on the under surface § Each hole is open & closed by 2 guard cells
Leaf diagram – stoma and guard cells
Stoma position
Stoma is a small hole Its size is controlled by 2 guard cells closed open
Stoma function is for gas exchange in the leaf Guard cell oxygen Provided plant is photosynthesising Carbon dioxide
Stomata open and close at different times of the day When it is light the plant needs CO 2 for photosynthesis so the stoma open At night (darkness) they close
Gas exchange
Roots – function and structure § Hold plant in position § Absorb water and minerals from the soil § Specialised cells to increase surface area for water intake
Wheat seed Root hairs Fragile parts of cells that grow from the main root They massively increase the surface area for absorption
Root hair cells (x 150)
Root ‘B’ has had the hairs damaged - Toughened root cap
- Function of stem in plants
- Function of the margin of a leaf
- Internal structure of a leaf
- 4 main parts of plants
- Vanessa jason
- Roots part i
- Lesson 3 existence and uniqueness
- Economic roots of american imperialism
- What is sum of roots in quadratic equation
- Perfect cube list
- Root stem and leaf are modified in
- Panda eats, shoots and leaves joke
- Section 23-2 roots answer key
- Do all plants have roots
- Leaves branches trunk and roots song
- Function of stems
- Why do plants need roots
- Types of root
- Stem – herbaceous
- Stem edible plants examples
- Where do fixed floating plants bear stomata on their leaves