Functions of the Respiratory System

The video tutorial explains the pathway of air from the nostrils to the alveolus, detailing the functions of the nasal cavity, pharynx, larynx, trachea, bronchus, bronchioles, and alveolus. It highlights the role of the nasal cavity in filtering and warming air, the pharynx and larynx in air passage and sound production, and the trachea and bronchus in connecting air to the lungs. The bronchioles and alveolus are discussed in terms of gas exchange. The epiglottis is explained as a valve that directs air and food to their respective passages.

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

• To digest food

• To produce sound

• To exchange gases

• To filter and moisten the air

Which part of the pharynx is involved in both the digestive and respiratory systems?

• Trachea

• Pharynx

• Larynx

• Nasal cavity

What is the common name for the larynx?

• Nasal cavity

• Voice box

• Bronchus

• Windpipe

How does the larynx contribute to sound production?

• By digesting food

• By vibrating vocal cords

• By exchanging gases

• By filtering air

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

• To exchange gases

• To connect the pharynx and larynx to the lungs

• To filter air

• To produce sound

Into how many bronchi does the trachea divide?

• One

• Two

• Three

• Four

What is the role of bronchioles in the respiratory system?

• To exchange gases

• To filter air

• To produce sound

• To carry air to the alveoli

Where does the exchange of gases primarily occur in the respiratory system?

• Trachea

• Alveoli

• Pharynx

• Nasal cavity

What is the function of the epiglottis during swallowing?

• To produce sound

• To open the windpipe

• To close the windpipe and direct food to the stomach

• To exchange gases

Why is nervous regulation essential for the function of the epiglottis?

• To exchange gases

• To produce sound

• To filter air

• To ensure proper air and food passage