Which is An/are Important Components of the Human Immune System

Question

Which is an/are important components of the human immune system?
A) skin
B) T cells
C) B cells
D) memory cells
E) All of these are important components of the human immune system.

Accepted Answer

All of these are important components of the human immune system. The skin provides a physical barrier against pathogens, T cells and B cells are immune cells that are important for recognizing and attacking pathogens, and memory cells are important for rapid response to future exposure to the same pathogen.