How Lungs Work

Why does your body need more oxygen when you are breathing hard?

• To cool down your body.

• To help your muscles work harder.

• To make your heart beat slower.

• To produce more carbon dioxide.

What is the correct path air takes when you inhale?

• Nose/Mouth -> Bronchi -> Trachea -> Lungs

• Nose/Mouth -> Trachea -> Bronchi -> Lungs

• Lungs -> Trachea -> Nose/Mouth -> Bronchi

• Bronchi -> Lungs -> Trachea -> Nose/Mouth

What happens to the diaphragm when you inhale?

• It moves up.

• It moves down.

• It stays still.

• It contracts and moves up.

Are you enjoying the video lesson?

• Yes

• No

What are alveoli?

• Large tubes that carry air to the lungs.

• Tiny air sacs in the lungs where gas exchange occurs.

• Muscles that help with breathing.

• Blood vessels that carry oxygen.

What two gases are exchanged in the lungs?

• Nitrogen and Oxygen

• Oxygen and Carbon Dioxide

• Hydrogen and Oxygen

• Carbon Monoxide and Carbon Dioxide