Respiratory System

What is the primary function of the respiratory system?

• To digest food

• To circulate blood

• To exchange gases (oxygen and carbon dioxide)

• To filter waste from the blood

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

• Trachea

• Lungs

• Stomach

• Bronchi

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

• To transport oxygen to the heart

• To filter air

• To facilitate the exchange of gases with the blood

• To produce mucus

How does oxygen enter the bloodstream?

• Through the digestive system

• Through the walls of the alveoli

• Directly through the skin

• Through the walls of the stomach

What happens to the diaphragm when you inhale?

• It relaxes and moves upwards

• It contracts and moves downwards

• It contracts and moves upwards

• It relaxes and moves downwards