Page 30 - Practical handout Lev 1-Pharm D- 2024-2025-with spec

Pharm D Level 1 Medicinal plants (PG 101)

A- Stomata روغثلا

It's composed of opening known as Osteol enclosed by guard cells which may be :
a- Two kidney shaped cells → as in dicot plants.

b- Two dumble shaped cells → as in monocot plants.
- These guard cells are enclosed by subsidiary cells (accessory cells).

Function of Stomata :- Water and gas exchange

Types of Stomata

1- Monocot 2- Dicot stomata
Stomata Diacytic Paracytic Anomocytic Anisocytic

Stomata: Stomata Stomata Stomata
It has guard cells In which the In which two It has more It has more than
with dumble subsidiary cells subsidiary than two two subsidiary

shape , with are two cells and cell arranged subsidiary cells but contains
elongated arranged parallel to the cells that have one cell smaller
epidermal perpendicular to access of the the same size. than other
cells access of the guard subsidiary cells.
guard cells.

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