Choose the correct match:
The first line of defence | It includes the physical and chemical barriers, that defend the body from infection. e.g. tears, mucus, cilia, stomach acid, fever. |
The second line of defence | It is a group of cells, tissues and organs that work together to defend the body from infections. It mainly occurs through macrophages, neutrophils, interferons. |
Third line of defence | It occurs through the specific immune system. e.g. B- cells (antibodies) and T- cells |
Fourth line of defence | There are only three line defence in the human body |