956 



THE ORGANS OF DIGESTION. 



the linea innominata. The larger upper cavity is called the abdominal cavity 

 proper. 



The form and extent of the abdomen vary with age and sex. In the adult 

 male with intestines moderately distended it is barrel-shaped or oval, somewhat 



A 



Male Type 



Infantile Type 



FIG. 574. Schematic outlines of the abdomen. 



flattened from before backward (Fig. 574, A, B, and (7). The infantile type is 

 conical with apex below, as the pelvis is undeveloped. In woman the type is a 



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Skin 



Superficial layer of P 

 superficial fascia 



Deep layer of super- 

 ficial fascia 



Areolar tissue and- 

 intercolumnar fascia 



Apoiieurosis of M. 

 obliquus externus 



M. obliquus interims 

 M. transversal!* 

 Fascia transversalis 



Sub-peritoneal area- 

 lar tissue 



FIG. 575. Antero-posterior vertical section through the outer third of Poupart's ligament, showing the 

 layers of the abdominal walls. Schematic. (After Tillaux.) 



reversed infantile, regardless of so-called civilized dress. The circumference of 

 the fully-developed pelvis here is always larger than that of the lower end of the 

 thorax. 



