How many lines of defence are present in our body?(a) One(b) Two(c) Three(d) FourThis 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

How many lines of defence are present in our body?(a) One(b) Two(c) Th

1.	How many lines of defence are present in our body?(a) One(b) Two(c) Three(d) FourThis 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
Answer» 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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