The endocrine system comprises of a number of glands that secrete chemical messengers called hormones. These chemicals circulate throughout body via the bloodstream to affect distant cells within specific organs. Endocrine glands include the hypothalamus, pituitary gland, pancreas, thyroid gland, ovary, testes and adrenal gland.
Disorders of hormone production can lead to conditions such as diabetes mellitus (insufficient insulin), hyperthyroidism (raised levels of thyroxine) and hypothyroidism (insufficient thyroxine). In this section you can find out more about the causes of each of these conditions, along with information about their symptoms, means of diagnosis and methods of treatment.