Thyroid Hormone Concentration and Receptor

Hormones are hormones secreted by the thyroid gland and their primary function is to regulate the speed of metabolism in many tissues. The thyroid gland releases its hormones into the bloodstream in response to a regulating hormone released by the pituitary gland called thyroid-stimulating hormone. It is the only organ in the body that has the ability to synthesize iodine in large quantities for use in the synthesis of thyroid hormones. It consists of two lobes, joined together by the isthmus, located above the windpipe, just below the cartilage, which is the marker for its location. The weight of the thyroid glands in humans ranges from 15-to 20 grams and the blood supply changes depending on the functioning of the gland. There are lymphatic vessels, but their function in relation to endocrine function is uncertain.