Th(> Abilomiual Muscles. 



Foramen voiiao cavae . , p.,,.^ stornalis rliaphragniatis 



269 



Cms / 



laterals 



Crus 

 mediale 



Pars costalis 

 diaphragmatis 



Centrum 

 tendineuiM 



Hiatus 

 oesophageus 



Pais lunibalis 

 diaphragmatis 



Hiatus aortieus 



Arcus Inniliocostali 

 medialis 



Arcus lumbocosta 

 lateralis 



. M. qiKidratus 

 lumborum 



. M. traiisversus 

 abdominis 



M. obliquus 

 interims abdomin 



M. obliquus 

 externus abdomin 



--M. iliai-us 



M. psoas major 



Corpus vertebrae lumbalis V 



M. psoas minor 



314. Diaphragm, viewed from beloAv and in front. 

 (The muscles of the chest have been removed, the abdominal muscles have been cut through transversely.) 

 Diaplirag"ma (diaphragm) (see also Figs. 313 and 315). Form and position: flat, 

 broad , kidney-shaped , tendinous in the middle (centrum teadineumj, otherwise fleshy ; it is 

 stretched out transversely between the abdominal and thoracic cavities; it bulges into the 

 thorax, being convex above, markedly so lateralward, less so in the middle, so that to the right 

 and to the left there arises a cupola-like elevation, those of the two sides being separated by 

 a shallow median depression; in the adult on moderate expiration the right cupola reaches 

 to close below the costocartilaginous junction of the A^^ rib, the left cupola to just above the 

 costocartilaginous junction of the 5*^^ rib (see Fig. 410). Origin: from the posterior surface 

 of the proc. xiplioideus sterni (jmrs sternalisj , from the internal surface of the anterior 

 ends of the 7*1^ 12tii rib (pars cosialis) and from the lumbar vertebrae (itars lumhalis). 



Spalteholz, Atlas. 18 



