Regional anatomy in its relation to medicine and surgery . tric muscle. The external carotid artery. The internal carotid artery. The bifurcation of the common carotid artery. The sterno-mastoid muscle, turned back. The omo-hyoid muscle, drawn aside. The outer cord of the brachial plexus. The middle cord of the brachial plexus. The inner cord of the brachial plexus. The subclavian artery. The clavicle. The superior thoracic branch of the axillary artery. The anterior portion of the digastric muscle. The body of the hyoid bone. The lingual artery and hypoglossal nerve. 17. The thyroid notch. 18
Regional anatomy in its relation to medicine and surgery . tric muscle. The external carotid artery. The internal carotid artery. The bifurcation of the common carotid artery. The sterno-mastoid muscle, turned back. The omo-hyoid muscle, drawn aside. The outer cord of the brachial plexus. The middle cord of the brachial plexus. The inner cord of the brachial plexus. The subclavian artery. The clavicle. The superior thoracic branch of the axillary artery. The anterior portion of the digastric muscle. The body of the hyoid bone. The lingual artery and hypoglossal nerve. 17. The thyroid notch. 18. The crico-thyroid muscle. 19. The superior thyroid artery. 20. The superior laryngeal nerve. 21. The left sterno-mastoid muscle. 22. The cricoid cartilage. 23. The common carotid artery. 24. The left lobe of the thyroid body. 25. The inferior thyroid artery. 26. The trachea. 27. The scalenus anticus muscle. 28. The pneumogastric nerve. 29. The innominate artery, 30. The phrenic nerve. 31. The manubrium sterni. 32. The first external intercostal I—? QJfD ^- LJi era THE REGION OF THE LABYNX. 175 from the prevertebral muscles and their fascia by the loose but strongpost-pharyngeal fascia, which is connected with the sheaths of the carotidvessels on each side (Plate 13), and which has an extension outward bythe gap in the deep cervical fascia by which the pharyngeal wall isbrought into relation with the parotid region, as in post-pharyngealabscess (page 133). In the connective tissue between the back of thepharynx and the axis vertebra there is a little lymphatic gland, whichsometimes is the seat of a suppurative collection. In the areolar layer between the pharyngeal fascia and the constrictormuscles is the pharyngeal plexus of veins, made up of numerous inter-communicating veins which branch in all directions and terminate inthe internal jugular veins. The structures of the pharynx receive their arterial blood by branchesfrom the ascending palatine and ascending phar
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