List one of the most common infectious agents that cause bacterial pneumonia and one of the most common infectious agents that cause viral pneumonia.

Answer the following questions:
Describe the role of hemoglobin molecules in relation to the respiratory system.
Explain how a pulse oximeter works.
Identify and compare at least three of the signs and symptoms of either an allergy and a cold; a cold and the flu; or an allergy and the flu.
List one of the most common infectious agents that cause bacterial pneumonia and one of the most common infectious agents that cause viral pneumonia.
List at least five of the signs and symptoms of tuberculosis.
Describe how cystic fibrosis affects the body, including the respiratory and other body systems.