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SCIENCE OF PLANT
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TISSUE
is
Cell of the same type or different types group together to carry special
function.
aerenchyma
PLANT TISSUES
dermal tissue, ground tissue, vascular tissue,
meristematic tissue
Vascular tissue
Meristematic tissue
Character and function
• Small cell• Big nucleous• Dense cytoplasm
Cell division- form new xylem and floem and others tissue as (for) plant grows up taller and higher.
type
Lateral meristem
• Vascular cambium• Cork cambium
Apical meristem
• Shoot tip• Root tip
Dermal tissue
Epidermis of a leaf and stem
function
• Protection ( wax covered.)
Flat cell and large vacuole
Ground tissues
ParenchymaCollenchymasclerenchyma
function
parenchyma• Store glucose and starch• Turgidity of this tissue
support plant( young leaf, herbaceous plant and aquatic plant)
• Large vacuole• Thin cell wall• Air spaces between cells
collenchyma• Support young plant and
herbaceous plant
• Cell wall thickened with cellulose(pectin) esp. at angle (UNEVENLY THICKENED)
• No air spaecs
Supportive cellStem, midribs of leaves
sclerenchyma
Characteristic and function• Cell wall is thickened with lignin• Thickened evenly• Absence of cytoplasm• Dead tissue• Fibres and sclerid
• Supportice cell/Support plant tissue (terresterial) and organ
(seed coat, fruit, vascular bundle, midribs of leaf)
Support petiole, young stem, herbaceous plant.
organ
A group of tissue work together to carry specific function
State the functions of the organs.
State all the tissues made up stem and a leaf.
State the function of the tissue.
ORGAN SYSTEMS
An organ system is a group of different organs operating together carrying out a definite task. Plants have shoot system and root system.
system
Shoot system• organs
Root system• organs