Human Respiratory System Quiz

Which structure is the first to encounter air during inhalation?

• Pharynx

• Larynx

• Trachea

• Nasal cavity

What is the primary function of the nasal cavity in the respiratory system?

• To exchange gases with the blood

• To warm, moisten, and filter incoming air

• To move food into the esophagus

• To produce sound during speech

After air passes through the nasal cavity, where does it go next?

• Pharynx

• Bronchi

• Alveoli

• Lungs

Which structure prevents food from entering the trachea during swallowing?

• Epiglottis

• Uvula

• Larynx

• Bronchus

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

• To transport air to the lungs

• To exchange oxygen with the blood

• To store oxygen

• To filter blood

Where does the trachea divide into two bronchi?

• At the pharynx

• At the larynx

• At the base of the lungs

• At the base of the trachea

What is the function of the bronchi?

• To carry air directly into the alveoli

• To exchange gases with the blood

• To filter dust particles from the air

• To transport air from the trachea to the lungs

Where does gas exchange occur in the respiratory system?

• Bronchi

• Alveoli

• Trachea

• Larynx

What are alveoli?

• Air sacs in the lungs where gas exchange occurs

• Branches of the bronchi

• Flaps that prevent food from entering the trachea

• Muscles that control breathing

Which of the following structures helps move mucus and trapped particles out of the lungs?

• Cilia

• Epiglottis

• Diaphragm

• Alveoli