Question

Which blood cells are part of our immune system?

Answer 1

Answer:

White blood cells are the key players in your immune system. They are made in your bone marrow and are part of the lymphatic system. White blood cells move through blood and tissue throughout your body, looking for foreign invaders (microbes) such as bacteria, viruses, parasites and fungi.

Explanation:

hope it will help you

Answer 2

coz they can't help in stoping the germs from entering into our body or killing thmm...