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The thyroid is a small, butterfly-shaped gland located at the base of your neck. It is one of many glands in the endocrine system in the body that regulate the function, growth and development of virtually every cell, tissue and organ in the body. Endocrine glands secrete hormones directly into the bloodstream.
Video: The Thyroid Gland: Functions, Calcitonin & TSH. Your thyroid gland produces the hormones T3 and thyroxine (T4), which play a role in metabolism. Your thyroid also produces calcitonin, which helps regulate blood calcium levels. In this lesson, you will learn about the thyroid gland and its hormones, including how they are regulated by TSH. Biology 105: Anatomy & Physiology / Science Courses.