3. PERMANENT TISSUE
Permanent tissue is composed of cells in which
growth has stopped.
These may be dead or living and thin or thick walled.
Permanent tissues may be classified into three they
are;
Simple tissue
Complex tissue
Secretory tissue
4. SIMPLE TISSUE
Simple tissue are homogenous in nature.
It is composed of structurally and functionally similar.
The main simple permanent tissues are;
Parenchyma
Collenchyma
sclerenchyma
5. PARENCHYMA
• Storage of food materials.
• Parenchyma is the main living tissue, so it helps in
regeneration and healing wound
• Thick walled parenchyma gives mechanical
support.
• Typical parenchyma cells gives
rigidity to plants.
• Parenchyma stores water in
fleshy succulent plant.
6. COLLENCHYMA
Collenchyma carries out photosynthesis if chloroplasts
are present.
Their walls are unevenly thickened.
The cell wall composed of
cellulose and pectin.
Collenchyma absent in monocot.
7. SCLERENCHYMA
• The main function of sclerenchyma is that it
provides mechanical support.
• It gives protection from various adverse
conditions.
• It helps in dispersal
of fruits and seeds.
• Xylem fibres help in
coduction of water.
• The gritiness of the pulp in fruits are due to the
presence of sclerids.
8. PHOLEM
• Pholem is a complex tissue meant for conduction food
material.
• Function is transportation
of food materials from
leaves to other parts of plant.
9. XYLEM
• Conducts water and minerals upwards from the
root to leaf.
• Gives mechanical support
to the plant body.
• Xylem parenchyma serves
for storage of food.
10. FOLLOW UP ACTIVITY
1. Explain simple tissue ?
2. What are the main functions of simple tissue?
