Inferior thyroid vein
The inferior thyroid vein may refer to any of the two, three or four veins that make up the venous plexus, an intricate system of interconnected veins that drain blood from the thyroid gland. Two veins divide from this plexus; the left vein merges with the brachiocephalic artery while the right vein merges with the superior vena cava, the major vein directly connected to the heart. Being a blood vessel, the function of the vein is to carry blood and transport it to many body structures. Specifically, the vein functions to carry deoxygenated blood from the thyroid gland, where it is transported back to the heart. Because the thyroid gland is a very vascular organ, the vein circulates a huge amount of blood together with the thyroid arteries. Since the venus plexus is located in front of the trachea, severe trauma to the frontal part of the neck may cause at least one inferior thyroid vein to rupture, leading to hemorrhage. Surgical procedures of the trachea are performed carefully to prevent such incidences.
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In Depth: Inferior thyroid vein