The immune system is a protective system of the body. When the cut is infected then the skin line of defense is broken.
What is a line of defense?
The line of defense in the immune system is the barrier that includes the physical and the chemical component that protects the body from the invasion of pathogens and antigens.
Skin is the first line of defense of the immune system that acts as the physical barrier and prevents the entry of harmful pathogens that can cause infection.
Therefore, the first line of defense skin is broken.
Learn more about the line of defense here:
https://brainly.com/question/1721237
#SPJ2
