Adrenal uh DREE nuhl, gland, is a small, pyramid-shaped organ that secretes many important hormones. The body has two adrenal glands, one on top of each kidney. The adrenals, also called suprarenals, measure about 2 inches (5 centimeters) each in diameter. Each adrenal gland consists of a medulla (inner core) and a cortex (outer shell).