Answer:
The immune system fight against pathogen and protect us from diseases.
Step-by-step explanation:
The immune system fight against foreign particles and protects body from outside invaders called foreign particles, such as bacteria, viruses, etc and toxins (chemicals released by microbes).
The immune system is made up of different cells ( like T cells, B cells, NK cells etc) organs (example; thymus) and proteins (complement system) that work together.
Types of immune system;
Two main type of the immune system are; i) the innate immune system (which we are born with) and adaptive immune system (The adaptive immune response is antigen-specific ).