Lung metastases are a devastating reality for over half of cancer patients whose tumors spread beyond their initial sites.

There are a number of similarities and differences between the model and the actual respiratory system. Structure Similarities Differences Glass tube/trachea Allows air to pass through ...

Inhalation and exhalation is the same as breathing or ventilation and is a physical process which moves air into and out of your lungs. Respiration is not the same as breathing, and is a chemical ...