ANATOMY IX A NUTSHELL. 505 



space by means of the lymph spaces which surround the olfactory nerves. 

 (6) Lymphatic vessels of the mouth and tongue. Those from the floor of 

 the mouth pass into the submaxillary lymphatic nodes after passing through the 

 Mylo-hyoid muscle. Those from the lips pass into both the submaxillary and 

 into the deep cervical nodes. Those deeply situated hi the check and in roof 

 of mouth join the internal maxillary lymphatic nodes. Those on the tongue 

 pass with the ranine vein and empty into the deep cervical nodes, after passing 

 through small lingual nodes in the Hyo-glossus muscle. Lymphatic vessels of 

 the front part of the tongue pass into the submaxillary nodes after passing 

 through the Mylo-hyoid muscle. (7) The lymphatic vessels i >f the pharynx 

 empty into the deep cervical nodes, but those from the upper pari of the pharynx 

 first pass through the post-pharyngeal node. Lymphatic vessels of the tonsil 

 empty into the submaxillary nodes. (8) The lymphatics of the larynx 

 empty into the deep cervical nodes. (9) The lymphatics vessels of the 

 upper part OF the CESOPHAGUS axd trachea open into the deep cervical nodes. 

 (10) The lymphatics of the thyroid gland open into the dee]» cervical nodes. 

 The deep lymphatic nodes of the head are, (1) the lingual, which are sit- 

 uated on the outer surface of the Hyo-glossus and Genio -hyo-glossus muscles. 

 There are two to four in number and collect the lymph from the upper surface 

 and posterior part of the substance of the tongue. The vessels from these nodes 

 empty into the superior nodes of the deep cervical nodes. (2) The [nternal 

 maxillary or deep facial nodes are situated behind the Buccinator muscle and 

 are three to six in number. Their radicles arefrom (a) the orbit, (b) the nose, 



(c) the temporal and spheno-maxillary fossaB, (d) the upper jaw. (e) the palate, 

 (f) the pharynx. The vessels from these nodes empty into the superior nodes 

 of the deep cervical nodes. (3) The post-pharyngeal node is situated near the 

 base of the skull on the Rectus capitis anitcus major muscle. Its radicles are 

 from (a) the pharynx, do nose, (c) the deep prevertebral muscles. 



The deep lymphatic nodes of the neck are, (1) an upper ski which passes 

 along the internal jugular vein as far as the thyroid cartilage. This set of 

 nodes receives radicles from the (a) inferior of the cranium. (In from the deep 

 muscle- of the upper part of the neck, (c) from the internal maxillary glands, 



(d) from the posterior half of the tongue, (e) from the middle portion of the 

 pharynx, (f) the upper part of the larynx, (g) the upper part of the thyroid 

 gland, (h) and some of the vessels from the submaxillary nodes. Vessels from 

 these nodes pass downward to the lower deep cervical nodes. (2) A lower 

 set which follows the internal jugular vein fr the thyroid cartilage to near it- 

 termination. These receive radicles from (a) the lower pari of the neck, (b) 

 the upper set of lymphatic node-, (c)the Lower part of the larynx, (d) lower 

 pari of thyroid gland, (e) the upper part of the oesophagus and trachea, (f) 

 from the superficial cervical nodes. The vessels which leave these node- end 

 in the jugular lymphatic trunk which mute- with the subclavian lymphatic 

 trunk to form the right lymphatic trunk on the right side and the thoracic duct 

 on the left side. 



