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