Photomicrograph of the adrenal gland. This low-power micrograph of a H&E-stained specimen shows the full thickness of the adrenal gland with the cortex seen on both surfaces and a central region containing the medulla. Within the medulla are profiles of the central vein. Note that the deeper portion of the cortex stains darker than the outer portion, a reflection of the washed-out lipid in the zona glomerulosa and outer region of the zona fasciculata. This section also includes a cross section of the adrenal vein, which is characterized by the longitudinally arranged bundles of smooth muscle in its wall. x20.
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