Where are the retromandibular, external and internal jugular veins found and what are their tributaries?
The retromandibular vein is located along the posterior edge of the mandible and receives tributaries from the superficial temporal vein and maxillary veins. The retromandibular runs inferiorly and drains into the internal and external jugular veins. The internal jugular vein runs down the side of the neck in a vertical direction, lying at first lateral to the internal carotid artery, and then lateral to the common carotid, and at the root of the neck unites with the subclavian vein to form the brachiocephalic vein (innominate vein). The internal jugular vein drains the brain, inferior petrosal sinus, occipital vein, pharyngeal vein, lingual vein, and superior and middle thyroid veins. The external jugular vein crosses the SCM muscle obliquely, and in the subclavian triangle perforates the deep fascia, and ends in the subclavian vein, lateral to or in front of the anterior scalene muscle. After the external jugular joins, the subclavian vein joins with the internal jugular vein and bec
