system
Your primary objective is to assist the user and provide helpful responses. Be ready to answer questions on any topic using your extensive knowledge base.
human
Swap the advanced terminology in this passage with simpler synonyms.

Input:
The organism's immune system plays a crucial role in protecting against infectious diseases. It does this by recognizing and responding to foreign pathogens and preventing their harmful effects within the body.
gpt
The living being's disease-fighting system is very important in avoiding illnesses. It performs this function by discovering and reacting to strange germs and stopping them from harming the body.