1 66 ANATOMY AND PHYSIOLOGY FOR NURSES 



that it is about twelve finger-breadths in length. Above, 

 it commences at the pylorus, and ascends obliquely back- 

 ward to the under-surface of the liver. It then descends 

 perpendicularly in front of the right kidney, and passes 

 transversely across the lower portion of the spinal column, 

 behind the colon, and terminates in the jejunum. The 

 ducts from the liver and pancreas open into the perpen- 

 dicular portion, about 6 inches from the stomach. 



FIG. 83. Duodenum: a, Mucosa; b, submucosa; c, muscularis mucosae; 

 d, Brunner's gland; e, crypts of Lieberkiihn (Leroy). 



The Jejunum. The jejunum is continuous with the 

 duodenum, and includes the upper two-fifths of the re- 

 mainder of the small intestine, lying chiefly in the umbili- 

 cal region and left iliac fossa. It has a pinkish tinge, and 

 is thicker than the remainder of the small intestine. 



The ileum is smaller, thinner in texture, and somewhat 

 paler than the jejunum. There is nothing to mark the 

 termination of the one or the commencement of the other 



