Immune system | The Magic School Bus: Inside Ralphie

What is a type of germ that makes you sick?

• bacteria

• red blood cell

What carries oxygen in the blood?

• bacteria

• red blood cells

What are part of the germ-fighting immune system?

• bacteria

• white blood cells

What are the two types of blood cells?

• pink and blue blood cells

• red and white blood cells

Is the human body designed to keep us safe and germs out?

• Yes

• No