Lymphatic System Basics
Immune System Defenders
Diseases and Disorders
How It Works
Fun Facts
100

This clear fluid circulates in the lymphatic system.

What is lymph?

100

These white blood cells are the body‘s main defense against infection.

What are leukocytes?

100

This common illness is caused by a virus that attacks the respiratory system.

What is the flu?

100

The first line of defense prevents most pathogens from entering the body?

What is the skin?

100

This everyday activity helps flush out toxins through the lymphatic system.

What is exercise?

200

These small, bean-shaped structures filter lymph and help fight infections

What are lymph nodes?

200

This type of white blood cell produces antibodies to fight specific infections.

What are B cells?

200

HIV attacks and weakens this type of immune system cells engulf.

What are T cells ( or CD4 cells)?

200

The immune system has two main parts: the innate immune system and this other that remembers past infections.

What is the adaptive immune system?

200

The lymphatic system doesn’t have a pump like the circulatory system. Instead, it moves lymph using these.

What are muscle contractions?

300

The lymphatic system works closely with this body system to remove waste and transport fluids.

What is the circulatory system?

300

These immune system cells engulf and digest harmful invaders.

What are macrophages?

300

An overactive immune system can mistakenly attack the body, causing these types of diseases.

What are autoimmune diseases.

300

Vaccines help the immune system by introducing this harmless form of a pathogen.

What is an antigen?

300

Some immune system cells are named after this part of the body because they were first found there.

What is the thymus (T cells)?

400

This organ, located in the upper left abdomen, filters blood and helps fight infections.

What is the spleen?

400

This organ, found in the chest, is where T cells mature.

What is the thymus?

400

This condition occurs when the lymphatic system doesn’t properaly drain fluids, leading to swelling.

What is lymphedema?

400

This is the process where immune cells learn to distinguish between the body’s own cells and foreign invaders.

What is self vs. non-self recognition?

400

This is the largest lymphatic organ in the body.

What is the spleen?

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