Biology key terms 0.0 / 5 ? BiologyRespiration and exerciseMicrobes and diseaseGCSEAQA Created by: nicole56789Created on: 23-03-14 08:52 What is a pathogen A pathogen is a microbe that causes disease 1 of 5 How do viruses make one feel ill? Viruses invade body cells and burst them 2 of 5 How do bacteria make one feel ill? Release toxins which poison the body and reproduce rapidly. 3 of 5 What is a vaccine A vaccine is weak or dead form of a pathogen which is inserted into the body for immunity to that pathogen. 4 of 5 Name two types of cell that help the immune system lymphocytes and phagocytes 5 of 5
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