Plant cell and Tissue Types

Simple tissues are composed of one cell type.
A) Parenchyma:
living cells with thin cell walls
functions: storage, photosynthesis, secretion
make up the bulk of the cortex and pith of stems and roots
B) Collenchyma:
living cells with unevenly thickened cell walls
most often found beneath the epidermis
main function is support
C) Sclerenchyma:
2 cell types:
i. Fibers: long, slender cells that occur in strands or bundles. ii. Sclereids: variable in shape, but much shorter than fibers.
cells are not living at maturity
very thick cell walls
primary function is support