- Parechyma cells have thin primary cell walls, are generally alive at maturity, and have a variety of functions.
- Collenchyma cells have unevenly thickened primary walls, are typically alive at maturity, provide support, and have plastic characteristics.
- Sclerenchyma cells have primary and secondary walls, may be dead at maturity, provide
support (elastic), and some are involved in water transport.
in leaf xs.
|Vascular bundle of monocot stem|
Fibers in oak wood xs, the
fiber lumen shows as a dark portion in the center of individual cells.
Also note the paranchyma cells making up the portion of the vascular ray.
Angular collenchyma cells in