immune system
Pronunciation
Noun
B1 Intermediate
Quick answer
The network of cells, tissues, and organs in the body that work together to fight off infection and disease.
Test yourself
Which word fits the gap? "A healthy diet helps keep your _____ strong."
Answer: immune system
In your own words, what does "immune system" mean?
The network of cells, tissues, and organs in the body that work together to fight off infection and disease.
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