Question

question 6
the immune system plays a critical role in our safety. which of the following is the main function of the immune system?
select one:
○a. excretes all waste to prevent harmful buildup of toxins
○b. acts as a defense system by attacking germs when they enter our bodies
○c. protects vital organs from physical harm
○d. is a physical barrier to the outside world

Explanation:

• Option a describes the function of the excretory system (e.g., kidneys, intestines).
• Option c describes the function of the skeletal system (bones protecting organs like the brain or heart).
• Option d describes physical barriers like the skin, which is a first line of defense but not the main function of the immune system itself.
• The immune system's core role is to identify and attack invading pathogens (germs) that enter the body.

Answer:

b. Acts as a defense system by attacking germs when they enter our bodies