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Question

Mention three types of Innate barriers of defence with an example each.

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Solution

The immune system provides both the types of immune response innate and acquired immune responses. Innate immunity occurs naturally due to genetic factors or physiology. It is a native immune response that present by birth. It provides:
(i) Physical barrier such as skin.
(ii) Physiological barriers such as pH of the stomach, bile juice, saliva and tears.
(iii) Cellular barriers such as leucocytes, macrophage cell and cytokine barrier.

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