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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).
The adrenal glands are tiny organs that rest on top of each kidney. Despite their small size, the adrenal glands play an important role in the body, producing numerous hormones that impact our development and growth, affect our ability to deal with stress, and help to regulate kidney function.he medulla, or inner part of the adrenal glands, produces the hormones norepinephrine and epinephrine, which regulate the fight or flight response in the body, the body's reaction to stressful events.