Thyroid gland preparation

Photograph of a human thyroid gland preparation (showing the positional relationship to the larynx and the trachea). The right and left lobes are shown, as is a third lobe, the pyramidal lobe, extending superiorly from the isthmus. (Source: preparation from 1925 at the Anatomisches Museum der Universität, Basel, Switzerland. Photograph by Mattes 2012. Courtesy of Wikimedia Commons. Creative Commons Attribution 2.0 Germany license.)