TOPOGRAPHICAL ANATOMY OF THE 



ventral part of the tube, and that they thin away dorsally where they 

 are broader and occasionally divided. Generally the ends of the 

 cartilage do not quite meet, though sometimes they may even overlap. 



The interior of the trachea is lined by a smooth mucous membrane 

 closely adherent to the cartilages, except along the dorsal wall, where 

 it is loose. 



M. rhomboideus 



cervicalis. 



M. splenius. 



M. semispinalis 



capitis. 



M. multifidus. 



M. longissimiis 

 capitis. 



M. longissimus 

 atlantis. 



Mm. intertrans- 

 versarii. 



M. longus capitis, 



M. brachioce- 

 phalicus. 



M. longus colli. 



M. omohyoideus. 



M. sternocephalicus. 



M. sterno- 

 thyreoideus. 



-■■ Liganientum nuchse. 



Dura mater. 



Spinal cord. 



Longitudinal sinus. 



A. vertebralis. 

 N. accessorius 



(ramus dorsalis). 

 V. vertebralis. 



-Oesophagus. 

 -N. vagus et n. 

 sympathicus. 



"A. carotis 



communis. 

 " V. jugularis. 



N. recurrens. 



^ Tracheal lymph 

 trunk. 



M. sternohvoideus 



Fig. 2. — Transverse section of the neck at the level indicated by A in Fig. 1 ; 



looking forward. 



The oesophagus. — The oesophagus,^ a muscular and membranous 

 tube 125-150 cm. in length, is that part of the alimentary canal which 

 intervenes between the pharynx and the stomach. For descriptive 

 purposes it is divided into cervical, thoracic and abdominal parts, with 

 the first of which the present dissection is concerned. 



1 olauv (oisein) [Gr.], to carry. (pdyrj/jia (phagema) [Gr.], food. 



