Pigmented Cells in the Pineal Gland of Female Viscacha (Lagostomus maximus maximus): A Histochemical and Ultrastructural Study

Figure 5

Photomicrograph of pigmented cells (arrowhead) in each pregnancy stage. (a) Nonpregnancy, (b) early pregnancy, (c) mid pregnancy, and (d) late pregnancy. Pinealocytes (p). Masson-Fontana silver method, counterstained with nuclear fast red. (a–d) scale bars: 25 μm.

(a)

(b)

(c)

(d)