1. Gross Anatomical study of crude Drugs
Histology of Cinnamon bark PH

2. DEPARTMENT OF TECHNICAL EDUCATION
ANDHRA PRADESH
Name : T.Sujata
Designation : Lecturer in pharmacy
Branch : Pharmacy
Institute : GPW, Guntur
Year : I D.Pharm.
Subject : Pharmacognosy
Subject Code : Ph -103
Topic : Gross Anatomical study of crude Drugs
Duration : 50 minutes
Sub topic : Histology of Cinnamon bark (3/8)
Teaching aids : PPT, Photographs PH

3. Gross Anatomical Study of Crude Drugs
Histology of Cinnamon Bark PH 3

4. Objectives On completion of this period you would able to learn about
Biological Source
Family
Histology
Constituents and
Uses of Cinnamon bark PH

5. Can you identify this picture?
Known to unknown
Can you identify this picture?
Cinnamon (Dalchini)
Fig : 1 PH

6. Which part of the plant it is? Ans: Bark 2. How do you identify ?
Ans: It looks like
3. Can we use this as medicinal purpose?
Ans: Yes
4. How do you identify the genuenity of the drug?
Ans; By Histological study PH

7. Family: Biological Source:
Dried inner bark of the shoots of coppiced trees of
Cinnamomum zeylanicum
Family:
Lauraceae PH

8. Histology A transverse section of cinnamon bark shows Cortex
Fig.85.2
A transverse section of
cinnamon bark shows
Cortex
Pericycle (stone cell layer)
Pericyclic fibres
Sclerides
Secondary Phloem
Phloem parenchyma
Phloem Fibres
Medullary rays
Mucilage cells
Oil cells PH

9. Fig.85.3
Cork
Cork and primary cortex are absent but occasional patches can be seen
Pericycle
Light colored
Wavy
Longitudinal lines
on out side of the bark PH 9

10. Pericyclic fibres In small groups 6 to 15 Lignified Sclerenchymatous
Fig.85.4
Pericyclic fibres
In small groups
6 to 15
Lignified
Sclerenchymatous
Occur at intervals PH 10

11. Sclerides 3 to 4 layers Pitted thickened Lignified walls Isodiametric
Fig.85.5
3 to 4 layers
Pitted thickened
Lignified walls
Isodiametric
Tangentially
elongated (U- shaped thickening)
Starch grains PH

12. Secondary Phloem 1.Phloem parenchyma Parenchymatous Acicular calcium
Fig.85.6
1.Phloem parenchyma
Parenchymatous
Acicular calcium
oxalate crystals
Starch grains (10µ dia)
2. Mucilage cells
3.Oil cells (big,isolated) 2 3 PH

13. Phloem Fibres Single Isolated or in small groups Circular
Lignified with stratification
12 to 22 to 35µ in diameter
200 to 500 to 600µ long
Fig.85.7 PH

14. Medullary rays Biseriate Narrow at inner side Wider towards out side
Fig.85.8
Medullary rays
Biseriate
Narrow at inner side
Wider towards out side
Contains starch
Acicular raphides PH

15. ChemicalConstituents
Volatile oil ( %)
Cinnamic aldehyde
Eugenol
Terpenes
Tannins PH

16. Uses Carminative Flavoring agent Mild astringent Aromatic
Powerful germicide (oil) PH

17. QUIZ 1. How the pericyclic fibers are arranged in pericycle?
Ans: 6 – 15 fibers in small groups at intervals
2. Name the other part present in pericycle.
Ans: Sclerides
3. Whether oil cells are arranged in groups or as isolated?
Ans: Isolated
4. What are the constituents of cinnamon?
Ans: Cinnamic aldehyde,Eugenol. PH

18. Frequently Asked Questions
1. Mention the Morphology, chemical constituents and uses of cinnamon (Oct/Nov2006)
What is bark? Write the morphology and histology of cinnamon (June 2002)
What are carminatives? Write the Biological source, family, constituents and uses of Cinnamon.( April 2000) PH