What is thyroid?

Thyroid gland is a very important organ of human body. It was once considered as the largest endocrine organ in the human body. With the development of medicine, some people now think that fat is also an endocrine organ. If there is, it is not the biggest. The thyroid gland is located in the lower part of thyroid cartilage and in front of trachea. Divided into two leaves, connected by isthmus, can move up and down with swallowing. What is normal is generally intangible, let alone visible. What you can see is second degree swelling. The thyroid gland mainly synthesizes, stores and secretes thyroid hormone, and then secretes calcitonin. Thyroid hormone is very important to human body. Except for red blood cells, brain, testis and lymphatic system, all tissues and cells in the body have thyroid hormone receptors. Its main function is to promote metabolism, growth and development, and promote the differentiation and maturity of the nervous system. Too much or too little thyroid hormone will have adverse effects on human body.