However, relative to PVCs, nondifferentiated
cells have more abundant free
ribosomes. In the lamellar epithelium, the nucleus
of the basal undifferentiated cells often sits on the
basal lamina above the pillar cell body. In epithelia
that are thicker than two cell layers (filament
epithelium), intermediate non-differentiated cells
are found. Desmosomes are found between nondifferentiated
cells and pavement cells. Hemidesmosomes
connect the basal undifferentiated cells
to the basal lamina anchoring the epithelium.
Caveolae, non-clathrin-coated plasma membrane
invaginations, can also be found along this cell
boarder as well.