Respiratory System Quiz

What is the primary function of the respiratory system?

• To pump blood

• To break down food

• To breathe in oxygen and expel carbon dioxide

• To protect the brain

Which organ is responsible for taking in air from the environment?

• Heart

• Lungs

• Brain

• Stomach

What gas do we exhale as a waste product?

• Oxygen

• Nitrogen

• Carbon dioxide

• Helium

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

• Alveoli

• Bronchi

• Capillaries

• Trachea

Which muscle helps the lungs expand and contract during breathing?

• Bicep

• Diaphragm

• Quadriceps

• Trapezius

What is the tube called that connects the throat to the lungs?

• Esophagus

• Trachea

• Aorta

• Pharynx

Which part of the respiratory system filters, warms, and moistens air?

• Lungs

• Nose

• Heart

• Liver

What happens when the diaphragm contracts?

• The lungs deflate

• The lungs inflate

• The heart stops

• The brain signals the body to sleep

What is the purpose of the cilia in the respiratory system?

• To digest food

• To fight infections

• To trap and remove particles from the air

• To produce energy

Which of the following is a sign of healthy breathing?

• Rapid and shallow breaths

• Deep and slow breaths

• Holding breath frequently

• Breathing through the mouth constantly