How are all of the organisms observed in this activity similar

Did you know that a blue wales tongue weighs more than an elephant?

Which statement describes a way in which the digestive and excretory systems work together? a. the nephrons absorb nutrients from food going to the large intestine. b. the excretory system balances blood gases in the small intestine. c. the intestinal villi filter blood and send wastes to the bladder. d. the excretory system balances the salts and water obtained from digested food

What problem would a person most likely have if her kidney did not work correctly?