Your thyroid — along with other glands like the ovaries, testes, pancreas, and adrenals, for example — is part of your endocrine system. Like all glands, the thyroid manufactures and releases hormones that perform key functions.
Your thyroid is shaped like a butterfly, and the two “wings” — known as lobes — are connected by a narrow strip of skin called the isthmus.
A normal adult thyroid gland weighs around one ounce. The thyroid is typically larger in women and enlarges during pregnancy.