Cell specialisation
Cell undergoing differention to carry a specific function.
Differention- Cell change it structure or shape in order to carry specific
function efficiently.
Xylem vessel
transport water from root to the leaves
support plant(mechanical strenght)
Differentiation of xylem
• Deposition of lignint
support• Elimination of cytoplasm- dead tissue
(reduce obstacle)• Elimination of the joined end wall to form
hollow tiub.
(enable water move in one water column continuosly)
Other examples
phloem
Specialised structure
• Seive plate• Seive tube
• Thin layer of cytoplasm
Live cell
function
Transport organic substances/ food from leaves to all parts of plant.
translocation
Specialised structure
• Long projection elongate from an epidermal cell
• To increase surface area • Enable more water absorbed by
root
Specialised structure
• Contain chloroplast ( not present in others epidermal cell like onion)• Thick inner wall• Thin outer wall
A type of epidermal cell
Function of guard cell
Control opening and closing of stomata.
Function oF stoma
Epidermal tissue
SPECIALISED AND FUNCTION
• MANY CHLOROPLAST• ARRANGE VERTICALLY• CLOSELY
• TRAP MORE LIGHT TO CARRY PHOTOSYNTHESIS
Plant cell
Parenchyma
OTHERS PLANT CELL