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