How do Skin, Hairs, Saliva form the first line of defense against diseases
How do Skin, Hairs, Saliva form the first
line of defense against diseases?
Answer: Skin, Nose hairs, Saliva act as the first line of defense.
Skin: It forms a physical barrier thus preventing the entry of of microbes.
Hairs: Prevent entering dust particles and germs.
Saliva: It washes away bacterial growth from teeth and mouth.
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