Understanding Breathing and the Lungs

What is the main function of the respiratory system?

• To digest food

• To circulate blood

• To exchange gases

• To protect the body

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Which part of the respiratory system is responsible for filtering, warming, and moistening the air we breathe?

• Lungs

• Trachea

• Nose

• Diaphragm

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What muscle helps the lungs to inhale and exhale air?

• Heart

• Diaphragm

• Stomach

• Liver

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Which of the following is a tube that connects the throat to the lungs?

• Esophagus

• Trachea

• Bronchi

• Alveoli

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

• Bronchi

• Alveoli

• Capillaries

• Veins

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Which gas do we inhale from the air that is essential for our survival?

• Carbon dioxide

• Nitrogen

• Oxygen

• Helium

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What happens to the diaphragm when you inhale?

• It relaxes and moves upward

• It contracts and moves downward

• It stays still

• It contracts and moves upward

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Which part of the respiratory system is also known as the windpipe?

• Larynx

• Trachea

• Bronchi

• Pharynx

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How does the respiratory system help in speaking?

• By using the diaphragm to create sound

• By using the lungs to produce sound

• By using the vocal cords in the larynx

• By using the nose to amplify sound

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What is the role of the bronchi in the respiratory system?

• To filter dust and particles

• To carry air from the trachea to the lungs

• To exchange gases with the blood

• To produce mucus

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