Endocrine organs are morphologically and structurally independent organs of the endocrine system that are visible to the naked eye. Endocrine organs are distributed throughout the body, mainly including the pituitary gland, thyroid gland, parathyroid gland, pancreas, adrenal glands, gonads and so on, which are involved in many physiological functions of the body. 1. Pituitary gland: Located in the brain, it is the most protected endocrine organ and is mainly controlled by the hypothalamus. 2. Thyroid and parathyroid glands: the thyroid gland mainly secretes thyroid hormone, which is the most basic hormone to maintain the body’s excitement and temperature metabolism; the glands on both sides of the thyroid gland are called parathyroid glands, which are more important hormones to regulate the body’s calcium, phosphorus and bone metabolism. 3. Pancreas: It promotes the secretion of hypoglycemic hormone and glucagon to balance the blood sugar in the body and control the stability of sugar metabolism. 4. Adrenal glands: They can secrete a variety of important hormones, such as glucocorticoids, hydrocorticoids, sex hormones, etc. They are also more important hormones for maintaining the state of wakefulness in the body. 5. Gonads: ovaries for women and testes for men are involved in many physiological functions. Endocrine organs are involved in the physiological regulation of the body through the secretion of various hormones, and when relevant abnormalities occur, endocrinology should be consulted in a timely manner.