. Cunningham's Text-book of anatomy. Anatomy. 966 THE VASCULAK SYSTEM. The upper surface of the first rib is below the vein. Tributaries.—Whilst the subclavian vein is the direct continuation of the axillary vein, and receives, therefore, the blood from the upper extremity, it has, as a general rule, only one named tributary, viz., the external jugular vein. Vena Jugularis Externa.—The external jugular vein (Fig. 785) is formed on the superficial surface of the sterno-mastoid muscle, a little below and posterior to the angle of the jaw, by the union of the posterior auricular vein with a branc
. Cunningham's Text-book of anatomy. Anatomy. 966 THE VASCULAK SYSTEM. The upper surface of the first rib is below the vein. Tributaries.—Whilst the subclavian vein is the direct continuation of the axillary vein, and receives, therefore, the blood from the upper extremity, it has, as a general rule, only one named tributary, viz., the external jugular vein. Vena Jugularis Externa.—The external jugular vein (Fig. 785) is formed on the superficial surface of the sterno-mastoid muscle, a little below and posterior to the angle of the jaw, by the union of the posterior auricular vein with a branch from the posterior facial vein ( temporo-maxillary). In many cases the branch Superficial temporal vein Occipital vein— %J^\\3v^^J W Internal maxillary veins— 'T ^VTvTT^k \ V\\ J 1 / Posterior facial vein ^T^T^Y^)' \ ^^^*^> Posterior auricular vein-. Posterior facial vein Supra-orbital vein Angular vein Lateral nasal vein Superior labial vein Inferior labial vein Anterior facial vein Secondary inferior labial vein Anastomosis between common facial and anterior jugular veins Anterior jugular vein External jugular vein Transverse cervical vein Fig. 785.—Superficial Veins of the Head and Neck. from the posterior facial vein is so preponderantly large that it is more correct to describe the external jugular vein as commencing as a branch of the posterior facial vein. After its formation the external jugular vein descends, with a slight obli- quity backwards, to the anterior part of the subclavian portion of the posterior triangle of the neck, where it pierces the deep fascia, and, after crossing in front of the third part of the subclavian artery, terminates in the subclavian vein. Whilst on the surface of the sterno-mastoid muscle it is covered by the super- ficial fascia, and platysma muscle, and it lies parallel with the great auricular nerve; after crossing the nervus cutaneus colli ( trans, cervical) it reaches the posterior border of the sterno-mastoid,
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