Question

If you cut your knee, pus, which is caused by _____, may form

Answer 1

Pus is caused by WHITE BLOOD CELLS!

Hope this helps! Have a great day and good luck! If you need more help, just ask! I'd be happy to answer some more of your questions!

Answer 2

Pus is caused by dead white blood cells.

Most white blood cells self destruct after eating one pathogen.
Many pathogens flood into your knee when it gets cut.
Thus, many white blood cells try to eat the pathogen but get self destructed afterward.

Have an awesome day! :)