Uricotelism refers to excretion of

Uricotelism refers to the excretion of Urates and Urea.
Ureotelism occurs when the major urinary excretory product is urea, whereas amino-ureotelism occurs when the major urinary excretory products are both ammonia and urea.
Urea is highly water soluble and difficult to concentrate; therefore, it must be excreted with significant amounts of water.