3. The body's natural defense against pathogens includes skin, tears, saliva, _ . A mucous membranes, and the respiratory system B mucous membranes, and the digestive system C and the digestive and respiratory

3. The body's natural defense against pathogens includes skin, tears, saliva, _

.
A mucous membranes, and the respiratory system
B mucous membranes, and the digestive system
C and the digestive and respiratory systems
D the lungs, and digestive system
Tonic
St Disease

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3. The body's natural defense against pathogens includes skin, tears, saliva, _ . A mucous membranes, and the respiratory system B mucous membranes, and the digestive syste…

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