Which of the following is considered part of the internal defense system?

Question

Quizplus · Accepted Answer

Neutrophils are part of the internal defense system, also known as the innate immune system. They are a type of white blood cell that can identify and destroy pathogens in the body. Options A, B, and D are considered part of the external defense system, which is the body's first line of defense against pathogens. Cilia, mucous membranes, and the acidity of the skin are physical barriers that prevent pathogens from entering the body.

Which of the Following Is Considered Part of the Internal