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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 ...
Deleted erroneous label to external pudendal vein. Deleted inferior thyroid vein (Since there are many other veins on the anterior face of the neck of equal importance). Redraw last intercostal veins. Add temporal vein (not labelled). Correct position of superior and inferior epigastric veins. Corrections of arrows of external iliac vein.
The parathyroid glands are variable in number: three or more small glands, [5] and can usually be located on the posterior surface of the thyroid gland. [5] Occasionally, some individuals may have six, eight, or even more parathyroid glands. [3] Rarely, the parathyroid glands may be within the thyroid gland itself, the chest, or even the thymus ...
The inferior thyroid veins originate in a network of veins and drain into the left and right brachiocephalic veins. [4] Both arteries and veins form a plexus between the two layers of the capsule of the thyroid gland.
The thyrocervical trunk soon divides into branches: the inferior thyroid artery, the suprascapular artery, and the transverse cervical artery. [2] The transverse cervical artery is present in about 2/3 of cases. In a third of cases the superficial cervical artery and the dorsal scapular artery arise as the transverse cervical artery. [3]
The thyroid gland also stretches across the upper trachea, with the isthmus overlying the second to fourth rings, and the lobes stretching to the level of the fifth or sixth cartilage. [2] The blood vessels of the thyroid rest on the trachea next to the isthmus; superior thyroid arteries join just above it, and the inferior thyroid veins below ...
Just above the sternum the two anterior jugular veins communicate by a transverse trunk, the jugular venous arch (or venous jugular arch), which receive tributaries from the inferior thyroid veins; each also communicates with the internal jugular. There are no valves in this vein.
The inferior thyroid artery is an artery in the neck. It arises from the thyrocervical trunk and passes upward, in front of the vertebral artery and longus colli muscle . It then turns medially behind the carotid sheath and its contents, and also behind the sympathetic trunk , the middle cervical ganglion resting upon the vessel.