A triangular gland situated on top of the kidney; suprarenal gland: The cortex of the adrenal gland (outer part) secretes various steroid hormones and other hormones that control salt and water metabolism and regulate the use of carbohydrates, proteins, and fats.

The medulla, the inner part of the adrenal gland, secretes the hormones adrenaline and noradrenaline which, during times of stress, prepare the body for "fight or flight".