Inferior thyroid veins
The inferior thyroid veins appear two, frequently three or four, in number, and arise in the venous plexus on the thyroid gland, communicating with the middle and superior thyroid veins.The inferior thyroid veins form a plexus in front of the trachea, behind the sternothyroid muscle.From this plexus, the left vein descends and joins the left brachiocephalic vein, and the right vein passes obliquely downward and to the right across the brachiocephalic artery to open into the right brachiocephalic vein, just at its junction with the superior vena cava; sometimes the right and left veins open by a common trunk in the latter situation.The inferior thyroid veins receive esophageal, tracheal, and inferior laryngeal veins, and are provided with valves at their terminations in the brachiocephalic veins.This article incorporates text in the public domain from page 666 of the 20th edition of Gray's Anatomy (1918) This cardiovascular system article is a stub.