Summary Mediastinum and its contents

MEDIASTINUM


Boundaries


anterior : ant . thoracic wall
,
costal cartilages ,
sternum


posterior :
sup . thoracic vertebrae

Superior : sup . thoracic aperture

inferior :
diaphragm
lateral :
parietal pleura



Parts of the mediastinum



> SUPERIOR



> INFERIOR

-
anterior

-
middle

-

posterior ( everything behind pericardial sac )


diaphragm ?

Contents of each
part

1. Superior mediastinum :




-
thymus
-
trachea

-

main broch us
-
Esophagus
-

superior vena cava

-
brachia cephalic veins

azygos vein
-




-


posterior interc . veins
-
aortic arch → brachioceph .
trunk
→ left common carat
t .
artery
left subclavian artery

-
left vagus nerve


phrenic
-


nerve




11 .
Anterior inferior mediastinum :




part of thymus
-




-


prepericardial lymph nodes


111 .
Middle inferior mediasternum :


-
heart ( pericardial sac )
-
inf .

part of sup .
vena cava


pulmonary veins
-




-
inferior V. cava


pulmonary trunk ✗ arteries
-