'1111: '/'//(I A'. L\. 



209 



Contents of Middle Mediastinal Space : 



1. rcricardimn and heart, and the cardiac root structure.'!. 



2. r/ire/iic nerve and its artery :irtcria comes iiirri plirenici. 

 V The aorta, pulmonary artery, and pulmonary rein. 



4. The vena Cttvet, superim- and inferior, ascending and descending. 



5. The trachea/ bifurcation and the two bronchial tubes. 



'(>. llronchial lymphatic glands and their vessels and nerves. 



7. The cardiac plexus of t/te sympathetic nerve. 



HVOID BONE 



Thyro-hyoid membrane 



THYROID CURTILAGE 



Sterno-thyroid muscle 

 Crico-thyroid 

 membrane 



Crioo-thyrold muBCle 



THYROID GLAND 



Right common carotid 



artttry 

 RIGHT P.\l-:l'M<:- 



is.\sri!K' XKIIVK 



Right iiifrrntll jinjui'tr 

 Level of sternum 

 SECTION OF CLAVICLE 

 SECTION OF FIRST RIB 



SECTION OF STERNUM 



Thyro-hyoid musole 



Lateral portion crico- 

 thyroid membrane 



Omo-hyoid muscle 

 Ster no-mutt old mucole 



CRICOID CARTILAGE 

 _ FIRST RINQ OF TRACHEA 



Left suspensory 



ligament 

 LEFT RBCl'KSBNT 



NBRrB 



CEsophagus 



Left innominate vein 



LEFT LOBE OF TIIVMU8 



Left internal mammary 

 artery 



LEFT LUNG 



Pericardium 



SECTION OF FIFTH RIB 

 CARTILAGE 



ENS1FORU CARTILAGE 



FIG. 147. THYMUS GI.AND IN A CHILD AT BIRTH. 



The Posterior Mediastinal Contents : 



1 . The aorta and posterior intercostal arteries. 



2. The oesophagus and pneiimogastric nei"'cs. 



3. The vena azygos and intercostal TCIHS. 



4. The thoracic duct and its fatty bed. 



5. The thoracic gangliated sympathetic cord. 



6. The greater, lesser, and smallest splanchnic nerves. 



