Question

Kristen cut her hand on a piece of glass. As the blood clots, how do white blood cells prevent bacteria on the glass from infecting her blood?
They bring more oxygen to the site for repair.

They destroy pathogens that enter the wound.

They form the platelet plug.

They cause blood vessels to constrict

Answer 1

The right option is ; They destroy pathogens that enter the wound  

White blood cells will prevent bacteria on the glass from infecting her blood by destroying the bacteria.

White blood cells are the cells of the immune system that protects the body against infectious disease and pathogens. White blood cells are present in every part of the body including the blood. White blood cells encompass any pathogens in the blood, engulf and break them down so as to destroy them .

Answer 2

White blood cells have the ability to engulf an infecting agent. They are like the soldiers in the blood, defending the body against an attacker. They would destroy a pathogen they encounter.