Written by the Fiveable Content Team • Last updated September 2025
Written by the Fiveable Content Team • Last updated September 2025
Definition
Collenchyma cells are elongated plant cells with unevenly thickened primary walls. They provide structural support, particularly in regions of new growth.
5 Must Know Facts For Your Next Test
Collenchyma cells are typically found under the epidermis in stems and leaves.
These cells remain alive at maturity and can continue to grow.
The thickening of collenchyma cell walls is primarily due to cellulose and pectin.
They offer flexibility and tensile strength, allowing plants to withstand wind and mechanical stress.
Unlike sclerenchyma cells, collenchyma cells do not have lignin in their cell walls.
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Related terms
Parenchyma Cells: Fundamental tissue composed of thin-walled living cells that function in photosynthesis and storage.
Sclerenchyma Cells: Plant cells with very thick primary and secondary walls fortified with lignin, providing rigidity.
Epidermis: The outermost layer of cells covering an organism, particularly in plants where it serves as a protective barrier.