Source: Thyroid image, Public Domain: http://bit.ly/SI51qY; Parathyroid image, Creative Commons: http://bit.ly/VYi65m; Struma image, Creative Commons: http://bit.ly/TBHya2; Marty Feldman image, Creative Commons: http://bit.ly/Ukqh5Q
An autoimmune disease that causes the thyroid gland to become overactive and over-secrete T₃ and T₄ and is the most common form of hyperthyroidism.
A non-cancerous enlargement of the thyroid gland that can sometimes occur on its own or when a person is lacking in iodine and the thyroid hormones.
A group of glands on the posterior thyroid that secrete parathyroid hormone to increase blood calcium levels by decreasing renal excretion of calcium and increasing osteoclast activity.
The largest endocrine gland located on the anterior trachea, the thyroid gland secretes hormones that elevate basal metabolic rate (BMR) called T₃ (Triiodothyronine) and T₄. (Thyroxine) The thyroid gland also secretes a hormone called calcitonin that lowers blood calcium levels by increasing renal excretion of calcium and inhibiting osteoclasts.