Exploring the Respiratory System

Which of the following is a part of the upper respiratory system?

• Lungs

• Nose

• Diaphragm

• Alveoli

What is the main function of the nose in the respiratory system?

• To pump blood

• To filter and warm the air

• To digest food

• To produce oxygen

Which of the following is NOT a part of the upper respiratory system?

• Trachea

• Nasal cavity

• Sinuses

• Pharynx

During exhalation, what happens to the air pressure inside the lungs?

• It increases

• It decreases

• It stays the same

• It becomes zero

Which part of the respiratory system is primarily involved in the exchange of gases?

• Bronchi

• Alveoli

• Larynx

• Pharynx

Why is it important for the air to be warmed and moistened before reaching the lungs?

• To increase oxygen levels

• To prevent damage to lung tissues

• To speed up breathing

• To cool the body