What is the primary function of the respiratory system?

• Digestion of food

• Circulation of blood

• Exchange of gases

• Production of hormones

Which part of the respiratory system is responsible for the exchange of oxygen and carbon dioxide?

• Trachea

• Alveoli

• Bronchi

• Larynx

What is the primary function of the respiratory system?

• Exchanging respiratory gases between the blood and external environment

• Digesting food

• Circulating blood throughout the body

• Producing hormones

Which system does the respiratory system work with?

• Digestive system

• Cardiovascular system

• Nervous system

• Endocrine system

What do the cells of the human body require a constant supply of?

• Nitrogen

• Oxygen

• Hydrogen

• Helium

What waste product must be removed from the human body during gas exchange?

• Oxygen

• Nitrogen

• Carbon dioxide

• Methane

Diagram showing the exchange of O2 and CO2 in the lungs.

• O2 is exchanged for CO2 in the alveoli.

• CO2 is exchanged for O2 in the trachea.

• O2 is exchanged for CO2 in the bronchi.

• CO2 is exchanged for O2 in the bronchioles.

Which of the following is NOT one of the three major parts of the respiratory system?

• Airway

• Lungs

• Heart

• Muscles of the Respiratory System

Which of the following is an organ of the respiratory system?

• Heart

• Liver

• Larynx

• Kidney

What is the primary function of the lungs in the respiratory system?

• Pumping blood

• Filtering waste

• Gas exchange

• Producing hormones