306 



ANATOMY FOR NURSES 



[Chap. XV 



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' Movements of large intestine — antiperistaltic. 

 Time required for food to pass from caecum to splenic 

 flexure about 6^ hours. 



( Alkaline reaction. 

 Secretion < Contains a great deal of mucus. 

 [ No enzymes. 



r Decomposition of proteins constant. 

 Large I Bacteria < Possible action on cellulose. 

 Intestine ) i Benefit doubtful. 



Undigested and indigestible portions of food. 

 Products of bacterial decomposition. 

 Feces { Great quantities of bacteria. 



Bile and other secretions. 

 Enzymes and inorganic salts. 

 Defecation — This term is appUed to the act of expelling 

 the feces from the rectum. 



Process of taking up digested food-stuffs and carrying them 

 to the blood. 



f Physical — Diffusion and osmosis. 

 Physiological — Reconstruction of end prod- 

 ucts of digestion into substances found in the 

 blood. 



1. Capillaries in the walls of the stomach and 

 intestines. This blood is carried by means 

 of portal vein to liver, from liver by he- 

 patic veins to inferior vena cava, thence 

 to right auricle. 



2. Lymphatics in the walls of small intestine 

 (lacteals) absorb digested fats and empty 

 into chyle cistern of thoracic duct, superior 

 vena cava, and right auricle of heart. 



Absorption 



Two parts 



Paths of 

 absorption 



