This issues occupy the second place in the rating of endocrine disease, following diabetes. The thyroid is a small gland located in the front of the neck; its shape resembles a butterfly. There are many glands in the body responsible for hormone function. But thyroid has a special role: it produces hormones that are essential for proper metabolism. They are called thyroxine and triiodothyronine. If the thyroid is out of order, other glands in the body also canβt work properly: adrenals, gonads, and pituitary. Consequently, it affects nervous and immune system.