Explain how insects excrete nitrogenous wastes? (8)

Insects have a circulating fluid system called hemolymph (blood system) =nitrogenous waste build up in hemolymph nitrogenous waste is absorbed by malpighian tubules = high solute conc in malphigian tubules ammonia is converted to uric acid which needs ATP product combines with the digested food products later on and uric acid and undigested food material are excreted from the anus with feces (uric acid is nontoxic) water absorbed by osmosis moves uric acid to hindgut solutes, water and salts are reabsorbed in the hindgut returns to hemolymph = recycled