mucosa 



circular ouscles 

 loDgitudinfll inuscles^^ 



blood vessels 

 mucoso 



sugar 



Fig. 17-10. A cross-section of the intestine with the villi greatly enlarged to show how absorption takes place. 

 Amino acids and sugars are shown entering the capillaries of the villi. Likewise the fatty acids and glycerol, 

 which become fats upon absorption, are taken into the lacteals of the villus. One villus is shown contracted while 

 the other is gorged with fat. This "pumping" action aids in moving the lymph. 



