A text-book of clinical anatomy : for students and practitioners . latter passes upward, then transverselyacross to the trachea, passing between the carotid sheath and vertebralartery (see Figs. 31 and 38). The vertebral passes to the transverseprocess of the sixth cervical vertebra, accompanied by the vein. Itcan be reached by an incision along the posterior border of the sterno-cleidomastoid, pulling the carotid sheath inward, and dissecting downto the transverse process of the sixth cervical (see Fig. ^^j. Deep Cervical Fascia.—It has already been seen that the outerlayer starts in the medi
A text-book of clinical anatomy : for students and practitioners . latter passes upward, then transverselyacross to the trachea, passing between the carotid sheath and vertebralartery (see Figs. 31 and 38). The vertebral passes to the transverseprocess of the sixth cervical vertebra, accompanied by the vein. Itcan be reached by an incision along the posterior border of the sterno-cleidomastoid, pulling the carotid sheath inward, and dissecting downto the transverse process of the sixth cervical (see Fig. ^^j. Deep Cervical Fascia.—It has already been seen that the outerlayer starts in the median line behind, and meets again at the medianline in front after inclosing the trapezius and sternomastoid musclesand submaxillary gland on each side (see Figs. ^ and 41). The middleor previsceral layer begins also in the median line behind, gives offlamellae to inclose the muscles at the back of the neck, and passes for-ward, forming the carotid sheath inclosing the common carotid, internaljugular vein, vagus, and a number of deep cervical lymph-glands, Fig. 42.—View of heart and large blood-vessels of thorax and neck in adult, i,Upper border of thyroid cartilage, opposite which the common carotid divides into theinternal and external carotid arteries. 2, Common carotid artery. 3, Internal jugular , External jugular vein. 5, Upper rings of trachea. 6, Subclavian artery. 7, Subclavianvein. 8, Arch of aorta. 9, Superior vena cava. 10, Lateral lobes of thyroid , Right bronchus. , Left bronchus. P, Pulmonary artery, xxx, Tricuspidvalve. A, Aortic valve. M, Mitral valves. The arrow passing up the aorta shows thedirection in which aortic murmurs are transmitted. The arrow beginning at M, anddirected toward the apex of the heart, shows the direction in which mitral murmurs aretransmitted. P, Position of pulmonary valve. 139 ifeqi/^r /Vcrytp, 7?//7nc//r>. l//n.
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