Why can't you use fresh pineapple in jello

What is the importantence of the carbon and nitretan cycles in the environment

Aboy jumps into a cold swimming pool and his body tempature goes down hus muscles ,blood vessels

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