Immune System

What is the immune system?

• Tells the difference between cells that are yours and those that don’t belong in your body.

• is part of your body’s first-line defense.

• is made up of a complex network of organs, cells and proteins that fight infection

• is protection your body gains (acquires) over time from exposure to germs.

These immune system cells attack and eliminate harmful germs to keep you healthy.

What does the immune system do?

• • Limiting how much harm the invaders can do if they’re inside your body.

• Fungi that can cause infections

• Parasites

• Cancer cells

Invaders your immune system protects you against include:

Name the parts of the immune system

How does the immune system work?

• • Healing damage to your body.

•   Tells the difference between cells that are yours and those that don’t belong in your body.

• • Destroying invaders.

Innate immunity is the protection that you’re born with.

• True

• False

is a protective barrier that helps stop germs from entering your body

This organ stores white blood cells that defend your body from invaders.

• Skin

• Thymus

• Lymph nodes

• Spleen

These proteins protect you from invaders by binding to them and initiating their destruction.

• White blood cells

• Antibodies.

• Cytokines

• Spleen