The parathyroid glands affect the amount of calcium in the blood and bones. Humans usually have 4 parathyroid glands, located on the back of the thyroid.
The adrenal glands sit at the top of the kidneys, dispensing hormones in response to stress.
The pancreas is a glandular organ that participates in the digestive and endocrine systems. As an endocrine gland, the pancreas produces several important hormones, including insulin, which regulates carbohydrate and fat metabolism. As a digestive organ, the pancreas facilitates digestion via the release of enzymes that help break down foodstuffs and absorb nutrients in the small intestine.