Learn the main parts of the lymphatic system and how they support the immune system in protecting the body from disease.
Read each problem carefully. Answer in complete sentences when needed, and show your thinking in the space provided.
How the body moves lymph and fights germs
Health - Grade 6-8
- 1
What is the main job of the lymphatic system?
- 2
Lymph is a clear fluid that travels through lymph vessels. Name two things lymph may carry.
- 3
Explain why lymph nodes often swell when a person has an infection.
- 4
Match each lymphatic structure to its function: lymph vessels, lymph nodes, spleen, thymus. Functions: filters lymph, carries lymph, helps T cells mature, filters blood.
- 5
What are white blood cells, and why are they important for immunity?
- 6
Describe the difference between a pathogen and an antigen.
- 7
A virus enters the body through the nose. Put these events in a logical order: immune cells respond, virus enters the body, symptoms may appear, body recognizes the virus as foreign.
- 8
What is the purpose of antibodies?
- 9
Explain how vaccines help the immune system prepare for future infections.
- 10
List three healthy habits that can support the immune system.
- 11
Why is handwashing an important way to reduce infections?
- 12
A student says, "The lymphatic system only works when you are sick." Explain why this statement is not correct.