I Believe the answer is Surface area
Answer:
To Pee And Poop
Explanation:
Water is needed for digestive juices, urine (pee), and poop. And you can bet that water is the main ingredient in perspiration, also called sweat. Besides being an important part of the fluids in your body, water is needed by each cell to work.
That an organ is a group of tissues that work together to perform a common function
