March 21st, 2016 Persepolis by: Marjane Satrapi

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Directions: ANSWER USING COMPLETE SENTENCES! Use the information you have been given to answer questions about: The Immune System

Level#1: The immune system defends against pathogens, or disease-causing substances. The immune system contains different kinds of cells and molecules that fight against pathogens in different ways. One type of cell that is part of the immune system is the white blood cell. For example, when a pathogen enters the body, the white cell finds it. They enter the tissue that is infected and attack the pathogen.

1. What does the immune system do?

2. What does the immune system contain?

3. What is the name of one type of cell that is part of the immune system?

Level#2: The immune system defends against pathogens, or disease-causing substances. The immune system contains different kinds of cells and molecules that fight against pathogens in different ways. One type of cell that is part of the immune system is the white blood cell. For example, when a pathogen enters the body, the white cell finds it. They enter the tissue that is infected and attack the pathogen. There are two special kinds of white blood cells ( T cells and B cells) called lymphocytes. They are part of the lymphatic system. They are also part of the immune system because they help the body fight disease. T cells identify pathogens. Then, they may attack the pathogens. T cells also attack the damaged body cells that the pathogens have already harmed.

1. What does the immune system contain?

2. Name one type of cell that is part of the immune system and explain what it does to protect the body.

3. What are the names of the two special kinds of white blood cells?

Level#3: The immune system defends against pathogens, or disease-causing substances. The immune system contains different kinds of cells and molecules that fight against pathogens in different ways. One type of cell that is part of the immune system is the white blood cell. For example, when a pathogen enters the body, the white cell finds it. They enter the tissue that is infected and attack the pathogen. There are two special kinds of white blood cells ( T cells and B cells) called lymphocytes. They are part of the lymphatic system. They are also part of the immune system because they help the body fight disease. T cells identify pathogens. Then, they may attack the pathogens. T cells also attack the damaged body cells that the pathogens have already harmed. Other times, T cells do not attack the pathogens directly. Instead, they stimulate B cells to produce substances called antibodies. Antibodies find certain pathogens and attach to them like a flag. This attachment makes it easier for other cells of the immune system, such as white blood cells, to identify pathogens. Then, the other cells find the pathogens and attack them.

1. What does the immune system do to defend the body and how does it do it?

2. Name a type of cell that is part of the immune system and explain what it does.

3. Name the two special kinds of cells and the two systems that they are both a part of.

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