Page 103 - PG 101-Course notes مذكرة النظري 24-25 with spec
P. 103

Medicinal plants (PG 101)                                        Level 1                              Clinical Pharmacy-PharmD



                  Lenticels:



                      o  When the epidermis is lost by the formation of periderm, the passage of gases

                         through the stomata can no longer takes place, So the lenticels arise beneath

                         the stomata and at an early stage of development of the periderm.

                      o  The cork cambium beneath the stomata has intercellular spaces between its

                         cells.

                      o  These  cells  divide  to  give  phelloderm  to  the  inside  and  thin  walled

                         unsuberized parenchyma to the outside which lose all connections with one

                         another and known as complementary cells.



































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