hissKcrioN of mi': i>o<; 



:{.-5 



costalis). It this be traced in a central direction, ii will be found to reach 

 the middle line of the Bternum, where ii meets its fellow membrane of the 

 opposite side. IV the Bternum the two pleura are reflected dorsalwards 



m. hi dorsi 



in. sir rut hi (/• 



TO. llr I 



I 



>la 8 

 m. I at is si hi us dorti 



Aorta 

 CEso 



mm. inttrcoslales 



u. filirritiaistiPt- 



iii. obliquus 

 abdominis alernus 



eaudaUt 



m. rectus abdominis j 



m. transvirsus thoracis 5 



m. peetoralis profundus- 

 tn. peetoralis superflcialU 



Fio. 10. — Transverse section of the thorax on a level with the eighth thoracic vertebra. 

 4, 5. t>. 7 fourth, fifth, sixth, and seventh ribs. 



as tho mediastinal pleura (pleura mediastinal is). Close to the sternum the 

 two pleurae are intimately associated and a thin double membrane is produced. 

 Soon, however, the heart intervenes between the two mediastinal pleurae 

 [here specifically known as the pericardiac pleura (pleura pericardiaca)], with 



D 



