Understanding the Respiratory System

What is the main function of the respiratory system?

• To control body temperature

• To bring oxygen into the body and remove carbon dioxide

• To circulate blood

• To digest food

What are the lungs primarily made of?

• Muscles

• Bones

• Blood vessels

• Air sacs

What muscle helps you breathe by moving up and down?

• Heart

• Diaphragm

• Stomach

• Biceps

What happens when blood reaches the lungs?

• It picks up oxygen

• It turns into carbon dioxide

• It cools down

• It stops moving

How many lungs does a human have?

• Four

• Three

• Two

• One

What do cilia in your windpipe do?

• Move air in and out

• Exchange gases

• Produce mucus

• Trap unwanted particles

Why is exhaling carbon dioxide important?

• It's necessary for digestion

• It increases oxygen in the blood

• It helps us cool down

• It removes waste gas from the body

What is one way to keep your respiratory system healthy?

• Avoiding fruits and vegetables

• Regular exercise

• Staying up late

• Eating lots of sugar

What unique feature do lungs have compared to other organs?

• They are the largest organ in the body

• They can float on water

• They are solid

• They can regenerate completely

Why do we yawn?

• Because we are bored

• To bring more oxygen into the lungs

• To cool the brain

• Because we are tired