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The thyroid is a 20-gram endocrine gland located in the anterior part of the neck in front of the trachea. It consists of 2 lobes and the isthmus that joins them. The pyramidal lobe is an elevation of the thyroid upwards. Arterial supply is from the upper thyroid artery branch of the external carotid artery and from the lower thyroid artery branch of the thyroid cavity. Topographically and closely related to the thyroid are the upper laryngeal nerve near the upper thyroid artery and the very important reciprocating laryngeal nerve which is responsible for the mobility of the vocal cords concurrently.
\n<\/span><\/p>\nThyroid function consists of the production of triiodothyronine (T3) and tetriodothyronine or thyroxine (T4) hormones that regulate the metabolism of the body and calcitonine which regulates calcium.<\/span><\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t