How can be done to prevent getting pancreatitis

How many trophic levels are there in the following food chain? phytoplankton - shrimp - perch - pike - osprey

Melting glaciers is a serious threat to the environment what is the possible consequence of melting glaciers on polar bears?

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