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Medicinal plants (PG 101) Level 1 Clinical Pharmacy-PharmD
2- Collenchyma
➢ They are living cells, more elongated and narrower than parenchyma cells with
non-lignified walls.
➢ Has a primary wall (cellulose and a secondary wall (hemi cellulose or pectin).
• Its function?
- They act as a supporting tissue in young growing organs as stems
and leaves.
- They are absent in roots, stems and leaves of monocots.
They may be:
a- Lamellar: b- Lacunar: c- Angular
If the thickness occurring If the thickness occurring with thickening usually
mainly on the tangential intercellular spaces at the corners.
walls than in the radial
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