Where does gas exchange occur in the lungs?

What part of the respiratory system is most known for having cilia?

Emphysema, which is typically a disease associated with smoking, causes damage to which part of the respiratory system?

The lymphatic system run semi-parallel to which important system of the body?

What muscle is responsible for the lungs expanding or contracting?

Gas exchange in the alveoli describes the process of ______ leaving the bloodstream, and ________ entering.

Someone with CF (Cystic Fibrosis) has excess _________ in their respiratory system.

What organ is the site of T cell development

What cells are responsible for recognizing and eliminating foreign pathogens?