Ted Ed: How Does Your Immune System Work?

What is the main role of the immune system?

• To protect the body from infections and diseases

• To make you feel itchy

• To make you hungry

• To help you sleep better

Where do leukocytes originate?

• In the heart

• In the bone marrow

• In the brain

• In the stomach

What do phagocytes do when they encounter foreign cells?

• They make them grow

• They ignore them

• They consume them

• They run away

What do B-cells produce to fight invaders?

• Antibodies

• Red blood cells

• Hormones

• Enzymes

What can cause the immune system to attack healthy cells?

• Autoimmune diseases

• Eating too much sugar

• Exercising too much

• Not sleeping enough