![]() lymphatic duct receives jugular, subclavian and bronchomediastinal lymph trunks sup: located at level of atlas and axis, large (2-3 cm long).around level of cricoid cartilage (C6 vertebra) mid: lies on ant aspect of inf thyroid a.inf: lies at sup 1st rib, wrapped around vertebral a., usually fused with 1st thoracic ganglion.has three enlargements (ganglia), superior, middle, inferior.it descends obliquely across the ant surface of scalenus ant, deep to prevertebral fascia.ascends to reach inf pole of thyroid where they ascend in tracheoesophageal groove to supply all intrinsic muscles of larynx except cricothyroid after looping both recurrent laryngeal nn.(post to brachiocephalic vein) and gives off recurrent laryngeal n. on right: vagus crosses origin of subclavian a.leaves skull through jugular foramen with internal jugular vein and CN IX and XI.descends in superf fascia between mid line and ant sternocleidomastoid, turns lat at root of neck and opens into termination of ext jugular.arises near hyoid from confluence of submandibular veins (submental venous plexus).smallest of jugular veins, usually paired (joined by jugular venous arch just sup to sternum).subclavian (from axillary v.), anterior to scalenus anterior.Part 3 (lat): dorsal scapular, (occasionally suprascapular a).Part 2 (post): costocervical trunk (® sup intercostal, deep cervical).thyroid, transverse cervical, suprascapular) Part 1 (med): vertebral, internal thoracic, thyrocervical trunk (® inf.is divided into three parts by scalenus anterior, it gives the following branches:. ![]()
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