Lesson 12.4 Crossword


1.a condition in which the immune system attacks the body's own tissue
4.a buildup of extracellular fluid in the body because of disruption in lymphatic drainage
6.a long-term, preventive treatment for allergies; "allergy shots"
7.an infection that rarely or never occurs in people with a healthy immune system but that may occur in a person with a damaged immune system, such as from AIDS


1.a severe and potentially life-threatening allergic reaction that may include airway obstruction and very low blood pressure
2.reduction or elimination of the allergic response, which may occur after immunotherapy
3.the spreading of cancerous cells from their original location to another part of the body
5.antigen that causes an inappropriately strong immune system response

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