ANATOMY OF A 17.8 MM. HUMAN EMBRYO 



41 



oesophagus. They are apparently vacuoles as maintained by 

 Forssner ('07), and Johnson ('10). A granular coagulum was 

 invariably found within them, but Kreuter ('05) who has studied 

 these structures concludes that a degeneration of cells does not 

 occur. For a general account of these structures see Lewis ('12). 



^.# 



\,hi 



Ih;/sf. 



KtllC.d 



Text fig. 2 Wax-plate reconstruction of the stomach, the duodenum and the 

 ])ancreas; the model is represented somewhat ventrally, from the right side. 

 A. du., antrum duodenale; C, coi'pus gastri; D. choL, ductus choledochus; D. cyst., 

 ductus cysticus; D. hep., ductus hepaticus; D. pane, d., ductus pancreatis dorsalis; 

 D. pane, v., ductus pancreatis ventralis; F., fundus gastri; Oe., oesophagus; Pane, 

 d., pancreas dorsale; Pane, v., pancreas ventrale; P. py., pars pylorica gastri 

 (H. E. C. 839). X 55 diams. 



Stomach. The stomach has assumed practically the adult po- 

 sition. It is represented by the entodermal lining only, in plate 1 

 and text figure 2 {Ga., C) . Its primitive dorsal border representing 

 the greater curvature has revolved to the left, while its ventral 

 border, now^ identified by the lesser curvature, faces toward the 

 right. Its entodennal lining is an epithelium containing four or 

 more layers of nuclei. It presents at the cardiac end a prominent, 

 dorsally directed pouch, the fundus (F.), which according to 

 Keith and Jones ('01) develops as a localized outgrowth. That 



