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Examen
Human Immunity 2023 with 100% correct questions and answers
Is an immune system unique to humans? 
no, all animals/organisms have an immune system 
 
 
 
List some external barriers of the innate system that prevent infection 
- invertebrates -- exoskeleton (tough, dry barrier that keeps out bacteria and viruses) 
- vertebrates -- skin and mucous membranes 
 
 
 
What cells are part of the innate system? 
- neutrophils 
- macrophages 
 
 
 
neutrophils 
functions in innate immunity as a type of phagocytic cell that tends to self-destruct as it destroys f...