break down food into nutrients transport nutrients and oxygen remove waste products from the body defend the body against foreign invaders
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which of these is not a function of the circulatory system?
Possibilities:
- break down food into nutrients
- transport nutrients and oxygen
- remove waste products from the body
- defend the body against foreign invaders

break down food into nutrients