Respiratory System Quiz

What is the main purpose of the respiratory system?

• To digest food

• To bring oxygen into the body

• To regulate body temperature

• To pump blood

Which part of the respiratory system allows you to take in oxygen and get rid of bad air?

• Lungs

• Mouth

• Nose

• Trachea

What is the dome-shaped muscle located just below the lungs that helps in breathing?

• Diaphragm

• Epiglottis

• Bronchi

• Alveoli

What is the function of cilia in the respiratory system?

• Filter air and prevent dust from entering the body

• Regulate heartbeat

• Absorb oxygen from the air

• Produce carbon dioxide

Which part of the respiratory system divides food and air into separate pathways?

• Capillaries

• Alveoli

• Bronchioles

• Pharynx

What is the process called where oxygen from the air and carbon dioxide from the cells are exchanged?

• Digestion

• Circulation

• Diffusion

• Respiration

How many alveoli are there inside a person's lungs?

• 600 million

• 1 million

• 100 million

• 10 million

What is the main function of red blood cells in the respiratory system?

• Regulate heartbeat

• Filter air in the lungs

• Produce carbon dioxide

• Absorb oxygen and pass it into the blood

Which part of the respiratory system is located in the chest cavity?

• Trachea

• Mouth

• Nose

• Lungs

What is the flap of tissue that covers the air-only passage of the pharynx when a person swallows?

• Alveoli

• Bronchi

• Diaphragm

• Epiglottis