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Thyroid Gland and Thyroid Hormones » About The Thyroid Gland

  • The thyroid gland is located in front of the trachea, below the cartilage called "Adam's apple".
  • The carotid arteries are located on both sides of the thyroid gland.
  • The shape of the thyroid gland looks like butterfly. It weighs 20-25 gram.
  • The thyroid gland is larger in women.
  • It increases in size a little bit more during pregnancy and menstrual periods.
  • It is the first developing endocrine gland in the mother's womb.
  • It is composed of left and right lobes; two lobes are connected with each other. The structure that connects the two lobes is called "isthmus".
  • The thyroid gland has arteries, veins and lymphatic vessels.
  • It has rich network of blood and lymphatic vessels.
  • In the thyroid gland,  thyroid hormones (T3 and T4) and calcitonin hormone are produced.