THE INGUINAL CANAL. 287 



It extends from the internal to the external abdominal ring, and extent, 

 measures about one inch and a half in length. From its beginning length and 

 at the internal ring, it is directed obliquely downwards and inwards, direction; 

 being placed above, and nearly parallel to, the inner half of 

 Pou part's ligament. 



Its anterior wall is formed by (1) the integuments and (2) by walls in 

 the aponeurosis of the external oblique muscle (fig. 106) for front> 



./ 



FIG. 106. DISSECTION FOR INGUINAL HERNIA (iLLrsiRATiONS OP DISSECTIONS). 



p. Spermatic cord, surrounded by 

 the infundibuliform fascia. 

 G. Trans versalis fascia. 

 H. Conjoined tendon. 



Muscles, d-c. : 



A. External oblique tendon, thrown 

 down. 



B. Internal oblique, the lower 

 part raised. 



c. Cremaster muscle in its natural 

 position. 



D. Trans versalis muscle with a 

 free border. 



Arteries : 



a. Epigastric. 



6. Offset of the circumflex iliac. 



its whole extent, and (3) by the internal oblique in its outer a nd behind 

 third. 



Its posterior wall is formed by (1). the peritoneum, sub-peritoneal 

 tissue and transversalis fascia (G) throughout its whole length, 

 (2) by the conjoined tendon (H) of the internal oblique and trans- 

 versalis muscles in its inner two -thirds, and (3) by the triangular 



