absorb oxygen and transfer it to body cells consume pathogens and assist the immune system accumulate at an injury and initiate the clotting process contain metabolites and maintain a balance of fluids
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: What is the primary function of macrophages?
Possibilities:
- absorb oxygen and transfer it to body cells
- consume pathogens and assist the immune system
- accumulate at an injury and initiate the clotting process
- contain metabolites and maintain a balance of fluids

consume pathogens and assist the immune system