4io 



THE DUCTLESS GLANDS 



The antero-lateral surface of the gland is placed under 

 cover of the sterno-thyreoid, sterno-hyoid and omo-hyoid 

 muscles. These muscles become stretched out, forming a 

 thin sheet over the gland when it is enlarged. On this 



FIG. 146. Transverse Section through the Neck at the level of the 

 First Thoracic Vertebra. 



1. Isthmus of thyreoid gland. 



2. Sterno-hyoid and sterno- 



thyreoid muscles. 



3. Right lobe of thyreoid gland. 



4. Sterno-mastoid muscle. 



5. Right recurrent nerve. 



6. Internal jugular vein. 



7. Common carotid artery. 



8. (Esophagus. 



9. First thoracic vertebra. 



account, the gland becomes very superficial and can readily 

 be palpated. 



The posterior surface of the gland overlaps the antero- 

 medial aspect of the carotid sheath, which may be thrust 

 deeply under cover of the sterno-mastoid when the gland is 



