Biology 2010 Student Edition

by Miller, Kenneth R.; Levine, Joseph S.

Published by Prentice Hall

ISBN 10: 9780133669510

ISBN 13: 978-0-13366-951-0

Chapter 35, Immune System and Disease - 35.2 - Defenses Against Infection - 35.2 Assessment - Page 1019: 2a

Answer

Immune system protects the body against pathogens/ antigens. When the body detects the presence of antigens, immune system is triggered and it fights with the antigens. Immunity can be natural or acquired (by vaccination, etc)

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