Respiratory System Quiz

What is the main organ of the respiratory system?

• Heart

• Lungs

• Stomach

• Liver

What is the function of the respiratory system?

• Pump blood

• Digest food

• Take in oxygen and remove carbon dioxide

• Send signals to the brain

What do we breathe in through our nose or mouth?

• Food

• Water

• Oxygen

• Carbon dioxide

What is the name of the tube that connects the throat to the lungs?

• Trachea/Windpipe

• Esophagus

• Vein

• Artery

What do we exhale when we breathe out?

• Oxygen

• Carbon dioxide

• Blood

• Nutrients

What muscle helps the lungs to move air in and out?

• Heart

• Diaphragm

• Liver

• Stomach

Which gas is necessary for human survival?

• Carbon dioxide

• Oxygen

• Nitrogen

• Helium

What do alveoli do in the respiratory system?

• Pump blood

• Exchange oxygen and carbon dioxide

• Carry food

• Produce energy

What happens to your breathing rate when you exercise?

• It slows down

• It speeds up

• It stops

• It stays the same

Which part of the respiratory system filters the air we breathe?

• Lungs

• Nose hairs

• Alveoli

• Diaphragm