Respiratory System Quiz

What is the primary function of the respiratory system?

• To help us breathe by exchanging gases

• To protect the body from infections

• To circulate blood

• To digest food

Which part of the respiratory system is described as a 'highway for air'?

• Trachea

• Bronchi

• Diaphragm

• Alveoli

What are the tiny air sacs in the lungs where gas exchange occurs called?

• Bronchi

• Trachea

• Alveoli

• Diaphragm

How does the diaphragm assist in breathing?

• By contracting and moving upwards

• By relaxing and moving downwards

• By contracting and moving downwards

• By relaxing and moving upwards

What is the waste gas that is expelled from the body during exhalation?

• Oxygen

• Nitrogen

• Carbon dioxide

• Hydrogen