One of a pair of glands located above each kidney that secretes hormones directly into the bloodstream. Each gland has two parts that perform different functions.
- The adrenal cortex produces and secretes hormones such as cortisol, aldosterone, and sex steroids. They are involved in many different bodily functions.
- The adrenal medulla produces and secretes catecholamines such as adrenaline (epinephrine) and norepinephrine.