Lesson 34 - Immune and Lymphatic System

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• A network of vessels and organs that helps your body fight infections and maintain fluid balance.

• Small, bean-shaped structures that filter harmful substances from lymph fluid and contain immune cells to fight infection.

• Proteins produced by the immune system that help identify and neutralize harmful invaders like bacteria and viruses.

• An organ located behind the breastbone where T-cells, a type of immune cell, mature and develop.

• An organ that filters blood, removes old or damaged blood cells, and helps fight infections.

Lymphatic system

Lymph nodes

Antibodies

Thymus gland

Spleen

• Lymphatic system

• Lymph nodes

• Antibodies

• Thymus gland

• Spleen