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The adrenal glands (also known as suprarenal glands) are endocrine glands that produce a variety of hormones including adrenaline and the steroids aldosterone and cortisol. They are found above the kidneys and consist of a series of layers with different structure and functions.ach gland has an outer cortex which produces steroid hormones and an inner medulla. The adrenal cortex itself is divided into three zones: zona glomerulosa, the zona fasciculata and the zona reticularis. The adrenal cortex produces a class of steroid hormones called corticosteroids, named according to their effects.
Each adrenal gland is comprised of two distinct structuresâthe outer part of the adrenal glands is called the adrenal cortex. The inner region is known as the adrenal medulla. Hormones of the Adrenal Glands. The adrenal cortex and the adrenal medulla have very different functions. One of the main distinctions between them is that the hormones released by the adrenal cortex are necessary for life; those secreted by the adrenal medulla are not. Adrenal Cortex Hormones.