The glandula thyroidea has long attracted the attention of the scientific world due to the number of disorders relating to it such as hypoand hyperthyroidism. The anatomical and functional properties of this gland have not been fully elucidated and are still being investigated. The glandula thyroidea has been phylogenetically characterized as one of the oldest and largest of the endocrine glands in vertebrate species (Onwuaso & Nwagbo, 2014).In rats, the glandula thyroidea are two-lobed structures at the C2-C3 level in Sprague-Dawley male rats, located lateral to the trachea near the base of the laryngeal cartilages (Hadie et al., 2013).