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The suprarenal glands, also known as adrenal glands, belong to the endocrine system. They are a pair of triangular-shaped glands, each about 2 in long and 1 in wide, that sit on top of the kidneys (see the image below).
1 The adrenal cortexâthe outer part of the glandâproduces hormones that are vital to life, such as cortisol (which helps regulate metabolism and helps your body respond to stress) and aldosterone (which helps control blood pressure).hey are located on top of each kidney. Their name directly relates to their location (ad ânear or at; renes âkidneys). 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.