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