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How many lines of defence are present in our body?

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in Biology – Class 12 by (271k points)
How many lines of defence are present in our body?

(a) One

(b) Two

(c) Three

(d) Four

This question was posed to me in class test.

My question is from Human Health and Disease topic in division Human Health and Disease of Biology – Class 12

1 Answer

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Correct choice is (c) Three

The explanation: Our body has three lines of defence. The first line of defence is Physical and Physiological barriers. The second line of defence includes Cellular and Cytokine barriers. The third line of defence includes humoral and cell-mediated immunity.

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