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