Please enable JavaScript.
Coggle requires JavaScript to display documents.
Plant cell specialisation (Epidermal tissue (Function (Protects plant from…
Plant cell specialisation
Divided
Meristematic tissues
Charactheristis
Dense cytoplasm
No vacuoles
Large nuclei
Not differentiated and still have the potential to divide
Thin walls
Divided
Apical meristem
Responsible for growth of plants
Lateral meristem
Responsible for the increase in the girth of plant
Permanent tissues
Characteristics
More mature cells
Undergoing differentiation or have already undergo differentiation
Divided
Ground tissue
Vascular tissue
Epidermal tissue
Epidermal tissue
Characteristics
Wall covered by cuticle
Most cell are flat and have large vacuole
Function
Protects plant from mechanical injury
Prevent invasion by microorganism
Prevent lost of excessive water
Adsorption of water
Form epidermis
Ground tissue
Form bulk of a plant
Divided
Collenchyma
Functions
Mechanical support
Distribution
Peripheral regions of stems and leaves
Characteristics
Wall thickened by cellulose and pectin
Living cells
Elongated,polygonal cell with unevenly thickened walls
Sclerenchyma
Function
Support
Protect inner part from damage
Distribution
Fibres
Patch or continuous bands in various parts of stem in many plants
Sclereids
Commonly in fruit and seed. Present in some leaves in large number
Characteristics
Wall thickened by lignin
Elongated with point end
More rigid than collenchyma
Irregular in shape
Cell cavity very small
Dead cell
Parenchyma
Functions
Give support and shape
Carry out photosynthesis
Store products of photosynthesis
Distribution
Cortex of stem and root
Mesophyll of leaves
Characteristics
Loosely arranged with space
Generally round and have large vacuoles
Thin walled
Least specialised
Living cell
Wall made up of cellulose
Vascular tissues
Involved in transport of substances between roots and shoots
Form vascular bundle
Divided
Xylem
Characteristics
Consists of tracheids and xylem vessel (this two features are dead cells)
Long tube joining together end to end
Wall thickened with lignin
Prevent food entering the cell
Dies upon reaching maturity
When cytoplasm disintegrates,a hollow tube is left behind
Allow water and minerals to flow easily
Function
Conduct water and minerals
Provide support and mechanical strenght
Phloem
Characteristics
Consists of parenchyma, sclereids, sieve tube and companion cells
Elongated cell
Have pores at both end (sieve tube), obtain nutrients and energy from companion cells
Function
Transport organic substances from leave to other part