462 ANATOMY IN A NUTSHELL. 



two-thirds of the middle lip of the crest of the ilium, and from the posterior 

 layer of the lumbar fascia. 



Insertion. — Those fibers which arise from Poupart's ligament arch down- 

 ward and inward over the spermatic cord in the male and the round ligament 

 in the female, and arc inserted with fibers of the Transversalis muscle into the 

 cresl of the os pubes and the pectineal line to the extent of half an inch. The 

 (•unjoined tendon is formed by the joining of the Internal oblique muscle and the 

 Transversalis just spoken of. The part of the muscle which arises from the 

 anterior one-third of the middle lip of the crest of the ilium, passes horizontally 

 and at the linea semilunaris it divides sending the lower one-fourth of its 

 aponeurosis in front of the Rectus muscle to be inserted into the linea alba, 

 while the upper three-fourths sends a layer of fascia in front of the Rectus 

 muscle to be inserted into tbe linea alba and a posterior layer to pass behind 

 the sheath of the Rectus muscle to be inserted into the linea alba also into the 

 seventh, eighth. and ninth ribs. That part of the muscle which passes obliquely 

 upward is inserted in the lower border of the cartilages of the three lower ribs 



PLATE CCL. 



SUP. BORDER 



^v 



MEDIAN I' I' 

 BORDER. SI-, .'/ 



LESSON CXLVIL 



Transversalis.- Description. — This muscle which is placed beneath the 

 Internal oblique takes its name from the direction of its fibers. 



Oniiiix. From outer one-third of Poupart's ligament, anterior three- 

 fourths of the inner lip of the crest of the ilium, and inner surface of the car- 

 tilages of the lower six ribs, interdigitating with the Diaphragm. It also comes 

 from the lumbar fascia. 



Insertion.— This muscle ends in a broad aponeurosis the lower part of 

 which joins the Internal oblique forming the conjoined tendon. The remain- 







./ GROOVE ^'^Bfc- 



■/ FOR NASAL NERVE. \*.*$&s»^~ 



A? 



The Nasal Bone. 



where it is continuous with the Internal intercostal muscles. The outer layer 

 of the conjoined tendon is called the ligament of Hesselback. while the inner 

 layer is called the ligament of Henle. 



A.CTION. — Same as External oblique. 



Nerve Supply.— Lower intercostals. ilio-hypogastric, and sometimes the 

 Uio-inguinal. 



Blood Supply. — Intercostal and lumbar arteries. 



