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Zinaida [17]
3 years ago
10

Identify how the physical barriers of the immune system protect the body against pathogens

Biology
2 answers:
torisob [31]3 years ago
8 0
The first physical barrier of the immune system is the skin. most pathogens are unable to pass through, unless thru a scratch or lesion.
sdas [7]3 years ago
7 0

skin contains tightly packed cells

skin is tough, flexible, and waterproof

you cough when a pathogen enters your mouth

you sneeze when a pathogen enters your nose

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