Question

Define immune system.

Answer 1

Immune system:

1. The immune system is a special type of defense mechanism that our body possesses.
2. It is formed of various components like T-cells, B-cells, natural killer cells, interferons, cytokines, macrophages, etc. that assist in identifying and killing a pathogen that enters the body.
3. The immune system produces antibodies against each type of pathogens that invade our body.