520 



HUMAN ANATOMY. 



fascia, the inner lip of the crest of the iUum, and the outer one-third of Poupart's 

 ligament. Its fibres pass horizontally inward to join the ventral abdominal aponeu- 

 rosis along the linea semilunaris ; the lower ones, however, bending somewhat down- 

 ward, pass into an aponeurosis which unites with that of the internal oblique to form 

 the conjoined tendon attached to the crest of the pubis. 



Nerve-Supply. — From the anterior divisions of the seventh to the twelfth 

 thoracic nerves and from the ilio-hypogastric and ilio-inguinal nerves. 



Action. — To compress the contents of the abdomen. 



Fig. 526. 



Serratus magnus 



Latissimus dorsi 



Edge of cut external oblique 



Edge of cut internal obliciue 

 Lumbo-dorsal fascia 



Fascia lata 



Cut edge of fascia lata 



Gluteus niaximus 



Tensor fascise latse 



-— Pectoralis major 



Edge of aponeurosis of external 

 oblique 



Edge of aponeurosis of internal 

 oblique 



Aponeurosis of transversalis 



Rectus, covered by sheath 



Conjoined tendon 



Cremaster fibres 



Dissection of lateral body-wall, showing transversalis muscle. 



The fascia transversalis is a thin layer of connective tissue which lines the 

 inner (deeper) surface of the transversalis muscle. Posteriorly it is continuous with 

 the strong aponeurotic band formed by the fusion of the superficial and deep layers of 

 the lurnbo-dorsal fascia, anteriorly it combines with the deeper layer of the ventral 

 2 bdominal aponeurosis to form the posterior layer of the sheath of the rectus muscle, 

 and above it unites with the fascia covering the lower surface of the diaphragm. 

 BeloM' its lateral portion is attached to the crest of the ilium and the outer part of 

 Poupart's ligament where it becomes continuous with the iliac fascia, but more medially 

 it is continued downward beneath Poupart's ligament to form the anterior wall of the 

 sheath of the femoral vessels, the portion of it immediately above the vessels being 



