| Front | reabsorption |
| Back | In excretory systems, the recovery of solutes and water from filtrate. |
| Front | protist |
| Back | An informal term applied to any eukaryote that is not a plant, animal, or fungus. Most [these] are unicellular, though some are colonial or multicellular. |
| Front | alimentary canal |
| Back | A digestive tract consisting of a tube running between a mouth and an anus; also called a complete digestive tract. |