This photograph shows the cortex and medulla of rat suprarenal gland. The cortex in this photograph includes the zona fasciculate and the zona reticularis. The cells of zona fasciculate are arranged in long straight cords which are separated by sinusoidal capillaries. The cells of zona reticularis are arranged in anastomosing cords which are separated by fenestrated capillaris.

This photograph shows the zona fasciculate of cortex. The cells of zona fasciculate are arranged in long straight cords, one or two cells thick, which are separated by longitudinal sinusoidal capillaries (stars).

This photograph shows the zona fasciculate of cortex. The cells of zona fasciculate are arranged in long straight cords, one or two cells thick, which are separated by longitudinal sinusoidal capillaries (stars). The cytoplasm of cell cords contains many lipid droplets (red arrows) which usually appears calculated in H&E sections . The black arrows indicates the endothelial cells of sinusoid.

This photograph shows the zona fasciculate of cortex. The cells of zona fasciculate are arranged in long straight cords which are separated by longitudinal sinusoidal capillaries (stars). The cells of cell cord have lightly stained nucleus (N) and their cytoplasm contains many mitochondria (blue triangles) and lipid droplets (L) which usually appears vacuolated in H&E sections. Besides, The black arrows indicates the endothelial cells of sinusoid.

This photograph shows the cells of zona fasciculate which are steroid-secreting cells. The cells of cell cord have lightly stained nucleus (N) and their cytoplasm contains many mitochondria with tubular cristae (blue triangles) which is the characteristic of steroid-secreting cells. Besides, lipid droplets (L) which usually appears vacuolated in H&E sections are also observed.

This photograph shows the cells of zona fasciculate which are steroid-secreting cells. The cells of cell cord have lightly stained nucleus (N) and their cytoplasm contains many mitochondria with tubular cristae (blue triangles) which is the characteristic of steroid-secreting cells. Besides, lipid droplets (L) which usually appears vacuolated in H&E sections and well-developed Golgi apparatus (G) . The black arrows indicates the endothelial cells of sinusoid.

This photograph shows the cells of zona fasciculate which are steroid-secreting cells. The cells of cell cord have lightly stained nucleus (N) and their cytoplasm contains many mitochondria with tubular cristae (blue triangles) which is the characteristic of steroid-secreting cells. Besides, lipid droplets (L) which usually appears vacuolated in H&E sections and well-developed Golgi apparatus (G) are also observed.

This photograph shows the medulla of suprarenal gland which contains chromaffin cells (C). The cells of medulla are arranged in ovoid group and short interconnecting cords with numerous capillaries in their fine supporting stroma. Veins (V) draining blood from the sinusoids of the cortex pass through the medulla.

This photograph shows the medulla of suprarenal gland which contains chromaffin cells (C). The cells of medulla are arranged in ovoid group and short interconnecting cords with numerous capillaries in their fine supporting stroma. Veins (V) draining blood from the sinusoids of the cortex pass through the medulla and its endothelial cells are indicates by black arrows.

The medulla of suprarenal gland contains chromaffin cells (C) which are characterized by numerous secretory vesicles with diameters of 100 to 300 nm, profiles of rER, and a well-developed Golgi apparatus. Veins (V) draining blood from the sinusoids of the cortex pass through the medulla and its endothelial cells are indicates by black arrows.

Chromaffin cells are characterized by numerous secretory vesicles (white arrows) with diameters of 100 to 300 nm, profiles of rER, and a well-developed Golgi apparatus.

Chromaffin cells (C) are characterized by numerous secretory vesicles (white arrows) with diameters of 100 to 300 nm, profiles of rER, and a well-developed Golgi apparatus. Mitochondria (black triangles) are also observed.

Chromaffin cells (C) are characterized by numerous secretory vesicles (white arrows) with diameters of 100 to 300 nm, profiles of rER, and a well-developed Golgi apparatus. Mitochondria (black triangles) are also observed.

Pinealocytes are the chief cells of the pineal gland, which are arranged in clumps or cords. They have a large nucleus with one or more prominent nucleoli (blue arrows) and contain lipid droplets (red arrows) within their cytoplasm. Star-shaped interstitial cells (arrowheads) are characterized by their densely-staining triangular nuclei and cytoplasm. Numerous blood vessels are also present in the photograph.

Pinealocytes have prominent nucleoli (blue arrows) and granular cytoplasm with many highly branched processes, some of which terminate near or upon blood vessels. Lysosomes (L) are also present in the photograph.

The photograph shows several processes of pinealocytes, in which mitochondria (M), lysosomes (L) , and Golgi apparatus (blue arrows) are observed.

The photograph shows several processes of pinealocytes, in which mitochondria (M), lysosomes (L) , and Golgi apparatus (blue arrows) are observed.

The photograph shows mitochondria (M) and Golgi apparatus (blue arrows) in pinealocytes.