Water helps your body maintain your body functions and regulates the temperature of your body and you lose water by doing activities by running, sweating and digesting its important to high drat all the time. Its important and re hydrate and eat food that have water in them like apples is an example.
Mitosis is probably the type of reproduction taking place because it deals with a sperm and an egg it is called (sexual reproduction)
Blood cells more then any other factor notice water doesn't have any cells in it and it flows freely and quickly.