Block9/Fig. 9, 93W6610, Adrenal gland, HE

block11_18.jpg - Fig. 8 & 9, NK-2-c, k-2-a Pituitary Gland, posterior lobe, HEThe posterior lobe seen here contains the nuclei inside the cells called pituicytes, and unmyelinated nerve fibers extended from the nuclei of the hypothalamus. The pituicytes are comparable with neuroglial cells of the central nervous system. The nuclei are round to oval. In H&E preparations such as this, the cytoplasm of the pituicyte cannot be distinguished from the unmyelinated nerve fibers. The hormones of the posterior lobe are formed in the hypothalamic soma and pass via the nerve fibers to the posterior lobe, where they are stored in the expanded nerve terminal portion of the nerve fibers. The stored neurosecretory material appears as Herring bodies. In H&E preparations, the Herring bodies simply appear as small islands of eosin-stained substance.

Fig. 9, 93W6610, Adrenal gland, HE This low-magnification micrograph of a section through the adrenal gland shows the outer capsule, which consists of dense connective tissue, the cortex and the underlying medulla. The cortex has a distinctly different appearance in both structural organization and staining characteristics of the medulla. A small amount of adipose tissue surrounds the capsule is seen at the lower portion of the micrograph. The corticomedullary boundary (dashed lines) has a wave-like contour. Within the medulla are a number of relatively large blood vessels. These are the medullary veins that drain both the cortex and the medulla.

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