Fig.9 93W3039, Transitional epithelium (cs) , HE. This
H&E-stained specimen shows the 5- to 6-cell-layer thickness
of the epithelium in the relaxed ureter. The surface cells are
characteristically the largest, and some surface cells are
binucleate (arrow). The ability of this epithelium to become
thinner and flatter allows all of these passages to
accommodate to distension by the urine.