The human thyroid as viewed frae the front, wi arteries visible.
Note the superior thyroid artery, which supplies the thyroid wi much o its bluid.
The thyroid as it mey be seen frae a posterior view, frae behind the trachea
|Precursor||Thyroid diverticulum (an extension o endoderm intae 2nd branchial airch)|
The thyroid gland, or simply the thyroid //, is ane o the lairgest endocrine glands in the body, an consists o twae connectit lobes. It is foond in the neck, ablo the laryngeal prominence (Adam's aiple). The thyroid gland controls hou quickly the body uises energy, maks proteins, and controls the body's sensitivity tae ither hormones. It pairticipates in these processes bi producin thyroid hormones, the principal anes bein thyroxine (T4) an triiodothyronine (T3), which is mair active. These hormones regulate the growth an rate o function o mony ither seestems in the body. T3 an T4 are synthesised frae iodine an tyrosine. The thyroid an aa produces calcitonin, which plays a role in calcium homeostasis.