Plants Structure Leaves stem roots Leaves Function of
- Slides: 21
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 -
This powerpoint was kindly donated to www. worldofteaching. com http: //www. worldofteaching. com is home to over a thousand powerpoints submitted by teachers. This is a completely free site and requires no registration. Please visit and I hope it will help in your teaching.
- Function of stem in plants
- Function of the margin of a leaf
- Function of leaves
- Objective of plants
- Chonp
- Is 125 a perfect square
- Lesson 3 existence and uniqueness
- Economic roots of american imperialism
- Quadratic equations roots
- Perfect cube list
- Leaf stem and roots are modified in
- Eats shoots and leaves joke dirty
- Leaf structure cube
- Living things that have leaves and roots
- Leaves branches trunk and roots song
- Internodes
- Plants
- Different types of roots
- Stem herbaceous
- Stem edible plants examples
- Adaptation in plants class 5
- Stem that we can eat