IXSECTA 83 



through their thin walls and discharged into the intestine. 

 These waste products, which result from the breaking down 

 of protein compounds (protoplasm), take the form of urea 

 or of uric acid. Uric acid is a crystalline substance not 

 soluble in water. Grasshoppers that live in very dry places, 

 where they need all their water, have uric acid as their 

 excretion product. Those which live in moist places 

 excrete urea, which is dissolved in water and eliminated as 

 urine. 



