ALFRED PASIEKA / SCIENCE PHOTO LIBRARY ALFRED PASIEKA / SCIENCE PHOTO LIBRARY
Adrenal glands. Artwork of a human figure in silhouette showing the position of the kidneys and adrenal glands. The kidneys (outlined in blue) form urine by filtering out waste products from the body's blood. Covering the top surface of each kidney are the adrenal glands (yellow). These endocrine glands secrete a variety of different hormones. They produce adrenaline (epinephrine), the body's stress hormone. Adrenaline increases the rates of the heart, breathing and metabolism to prepare the body for "fright, flight or fight". The adrenal glands also produce corticosteroid hormones which affect carbohydrate and electrolyte metabolism and the sex glands.
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