Assertion: immune system | /r/CapableOf | recognize antigen
Facets:
Source sentences:
text: When the body senses foreign substances (called antigens), the immune system works to recognize the antigens and get rid of them.
text: When the immune system detects an antigen, it responds by producing proteins called antibodies that destroy the harmful substances.
text: When the body senses foreign substances (called antigens), the immune system works to recognize the antigens and get rid of them.