Memory The Endocrine SystemVersión en línea Review the organs of the endocrine system and their functions. por Kathy Dilliplane Produces melatonin to regulate sleep cycles The body's "Master Gland" that controls the other endocrine organs. Increase heart rate during a "Fight or Flight" response Regulates growth and metabolism Thymus Regulates calcium levels in the blood. Ovaries Regulates blood sugar levels Regulates the female reproductive system Adrenal Glands Pituitary Pineal Gland Helps the immune system recognize and fight pathogens Parathyroid Glands Regulate the male reproductive system Testes Pancreas Thyroid