Respiratory System

What is the correct order of structures air passes through when entering the lungs?

• Windpipe -> Bronchioles -> Bronchial tubes -> Alveoli

• Windpipe -> Bronchial tubes -> Bronchioles -> Alveoli

• Bronchial tubes -> Windpipe -> Bronchioles -> Alveoli

• Alveoli -> Bronchioles -> Bronchial tubes -> Windpipe

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What is the primary function of the alveoli and capillaries in the lungs?

• To filter dust and foreign particles from the air.

• To warm and humidify incoming air.

• To exchange oxygen and carbon dioxide between air and blood.

• To produce mucus for lubrication.

What characteristic of the airways and air sacs allows them to fill with air like small balloons when breathing in?

• Their rigid structure

• Their elasticity

• Their smooth muscle lining

• Their extensive nerve supply

Which of the following is NOT listed as a step to help protect your lungs from injury or disease?

• Avoiding secondhand smoke.

• Consuming a high-protein diet.

• Being physically active.

• Getting regular check-ups and vaccines.