Page 34 - Practical handout Lev 1-Pharm D- 2024-2025-with spec

Pharm D Level 1 Medicinal plants (PG 101)

2. Ground Tissue
It may be : A-parenchyma B- collenchyma C- Sclerenchyma

A- Parenchyma ةيميشناربلا ايلاخلا
- They are living cells, having thin cellulosic walls and inter cellular spaces and

a large vacuole & Isodiametric or elongated in shape ,it may be :
a- Normal b- Chlorenchyma c- Aerenchyma
parenchyma

They are isodiametric It contains chlorophyll Parenchyma with large
or elongated cells in and present in leaf. intercellular spaces
shape, ( It forms palisade layer which filled with air.
& spongy tissue)
Function : store for Function : Function: floating of
food and water. photosynthesis. the aquatic plants.

B- Collenchyma
They are living cells , More elongated and narrower than

parenchyma and having thicker cellulosic wall
Function: responsible for stretching power and supporting.

a-Angular Collenchyma:
where cellulose (thickening material) is deposited in the
angles where many cells joint together (deposited on corners)

b-Lacunar Collenchyma :-
with very small intercellular spaces where
cellulose is deposited on the walls facing these spaces

c-Lamellar Collenchyma :- the cells are arranged in
tangential rows and the thickening material is
deposited on the tangential walls

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