Fig. 1, NK-1-a, Thyroid gland, HE.
A histologic section of the thyroid gland is shown here. The
follicles vary somewhat in size and shape and appear
closely packed. The homogeneous mass in the center of
each follicle is the colloid. The follicular cells appear to form
a ring around the colloid and the nuclei of the cells serve as
an indication of their location and arrangement. Para-
follicular cells could be found in thyroid gland, however
these cells are very sparse.