. Anatomy, descriptive and applied. Anatomy. 584 THE VA&CVLAB SYSTEMS duct, and the left recurrent laryngeal nerve. To its right side, it is in relation with the innomi- nate artery, inferior thyroid veins, and remains of the thymus gland. To its left side, with the left vagus nerve, left pleura, and left lung. The left subclavian artery is posterior and slightly external to it. Plan of the Relations of the Left Common Carotid. Thoracic Portion. In front. 1 Sternum. Sternohyoid and Sternothyroid muscles. Left innominate vein. Remains of the thymus gland. Intemallv. / \ Externally. ^ I 1 .a
. Anatomy, descriptive and applied. Anatomy. 584 THE VA&CVLAB SYSTEMS duct, and the left recurrent laryngeal nerve. To its right side, it is in relation with the innomi- nate artery, inferior thyroid veins, and remains of the thymus gland. To its left side, with the left vagus nerve, left pleura, and left lung. The left subclavian artery is posterior and slightly external to it. Plan of the Relations of the Left Common Carotid. Thoracic Portion. In front. 1 Sternum. Sternohyoid and Sternothyroid muscles. Left innominate vein. Remains of the thymus gland. Intemallv. / \ Externally. ^ I 1 .aft P^mmnTi \ "^. Innominate artery. I Thoracic Left vagus nerve. Inferior thyroid veins. \ Portion. / Left pleura and lung. Remains of the thymus gland. \_^ / Left subclavian artery. Behind. Trachea. Oesophagus. Thoracic duct. Left recurrent laryngeal nerve. The cervical portions of the two common carotids resemble each other so closely that one description will apply to both. Each vessel passes obliquely upward from behind the sternoclavicular articulation to a level with the upper border of the thyroid cartilage, opposite the fourth cervical vertebra, where it divides into the external and internal carotid arteries. At the lower part of the neck the two common carotid arteries are separated from each other by a small interval, which contains the trachea; but at the upper part, the thyroid body, the larynx, and pharynx project forward between the two vessels, and give the appearance of their being placed farther back in this situa- tion. The common carotid artery is contained in a sheath derived from the deep cervical fascia, which also encloses the internal jugular vein and vagus nerve, the vein lying on the outer side of the artery, and the nerve between the artery and vein, on a plane posterior to both. On opening the sheath these three struc- tures are seen to be separated from one another, each being enclosed in a separate fibrous investment. Relations.—At the lowe
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1913
