The 'first line of defence' is known as:

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(C) The 'first line of defence' in the human body consists of physical and physiological barriers that prevent the entry of pathogens.Skin is the prim

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Skin

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(C) The 'first line of defence' in the human body consists of physical and physiological barriers that prevent the entry of pathogens.Skin is the primary physical barrier that acts as the first line of defence by preventing the entry of microorganisms into the body.Other components like mucus and secretions also contribute to this barrier,but among the given options,skin is the correct answer.

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