The body's first line of defense against pathogens is mucous membranes. They provide a barrier that helps to trap and prevent pathogens from entering the body. While white blood cells play a crucial role in the immune response, they are part of the body's second line of defense.
What is the body's first line of defense against pathogens?
Question 2 options:
white blood cells
red blood cells
lymph nodes
mucous membranes
1 answer