The Immune System Worksheet
Explore the components and functions of the human immune system with this Grade 9 science worksheet.
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The Immune System
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Read each question carefully and answer to the best of your ability. Use complete sentences for short answer questions.
1. Which of the following is NOT a primary component of the immune system?
White blood cells
Lymph nodes
Red blood cells
Spleen
2. What is the main function of an antibody?
To produce hormones
To transport oxygen
To identify and neutralize pathogens
To break down food
3. The body's first line of defense against pathogens includes the skin, mucous membranes, and .
4. are foreign substances that can trigger an immune response.
5. The process by which white blood cells engulf and digest foreign particles is called .
6. Explain the difference between innate and adaptive immunity.
7. Describe the role of vaccines in preventing infectious diseases.
8. All bacteria are harmful to the human body.
True
False
9. The lymphatic system is a key part of the immune system.
True
False
10. Observe the diagram of an antibody below and answer the question.
What is the primary role of the variable region of an antibody?