thyroid gland produces and secretes
The thyroid gland produces the hormones thyroxine, triiodothyronine, and calcitonin. Thyroxine and triiodothyronine are produced by thyroid folliclar cells. Thyroid cells absorb iodine from certain foods and combine the iodine with tyrosine, an amino acid, to make thyroxine (T4) and triiodothyronine (T3).
The thyroid gland is located at the front of your neck. This gland secretes hormones that govern many of the functions in your body, such as the way the body uses energy, consumes oxygen and produces heat. Thyroid disorders typically occur when this gland releases too many or too few hormones.