Relier Pairs 1.22 Inmune system concepts (D)Version en ligne Some inmune system concepts par Jorge Arizpe 1 Any external biological agent that can harm the host 2 These are part of the second barrier 3 Sustancia que al introducirse en el organismo induce en este una respuesta inmunitaria, provocando la formación de anticuerpos. 4 We acquired this type of inmunologycal defense along aour lives. 5 Pathogens that live outside the cells. 6 These are part of the Third barrier 7 We are born with this type of inmunologycal defense. 8 This are pathogens that need to live inside a cell. 9 They are the first barrier