1. Tissue System The dermal or Epidermal Tissue System
The Fundamental or Ground Tissue System
The Vascular Tissue System

2. Epidermal Tissue system Procambium Vascular bundle
Promeristem
Protoderm
Epidermis
Epidermal Tissue system
Procambium
Vascular bundle
Vascular tissue system
General meristem
Ground meristem
Cortex, pericycle, medulary ray, pith

4. The Dermal Tissue System
The Epidermis
Functions of Epidermis
Protect the internal soft tissue against mechanical injury
Prevent excessive transpiration
Store water in xerophytic plant
Secretory substances

5. Structures of epidermal cells
Morphology
Arrangement
Cell contents
Wall structures

6. Special epidermal structures
1. Lithocytes
Deposition of calsium carbonate crystal
Arranged in the form of bunches, like those of grapes
Such deposition is called cystolith and cells containing them are called lithocytes

7. 2. Myrosin cell
Contain special sac-like cells scattered in the epidermis
Filled with enzyme myrosin, called myrosin cells
These are idoblastic cell

8. 3. Scleretic cells Epidermal cells contain sclereids
4. Bulliform cells
Bubble like cells are found in certain grass family
Bulliform cells are mainly water containing cells
Less amount of chlorophyll content

9. 5. Stomata 1.Ranunculaceous or Anomocytic 2. Cruciferous or Anisocytic
3. Rubiaceous or Paracytic
4. Diacytic stomato

10. Anomocytic
Anisocytic
Diacytic
Paracytic

14. 6. Trichome A. Non-glandular trichomes Unicellular trichome
Multicellular trichome
B. Glandular trichomes
Include unicellular and multicellular trichomes which secret a sticky substances

18. 7. Root hairs Unicellular, elongated
Arises from the epidermal cells of roots
They are usually absent in aquatic roots

19. Hairs or Trichome i) Unicellular ii) Multicellular iii) Stinging hairs
iii) Scale or peltate hairs

20. Vascular Tissue Conducting strand known as vascular bundle
Xylem and phloem

21. Origin of vascular tissue
Procambium
Cambium

22. Arrangement
Exarch
Endarch
Mesarch

23. Types of Vascular bundle
Radial
Conjoint
Concentric

24. Radial
Xylem and phloem are found as separate patchs on alternate radii

28. Conjoint Xylem and phloem occur side by side on the same radius
A. Collateral
i) Open type
ii) Closed type
B. Bicollateral
Open type
Closed type

29. Concentric One complex tissue remains surrounded by other
Amphivasal or leptocentric
Amphicribal or hadrocentric