A researcher is studying how pneumonia affects alveoli, small sacs in the lungs responsible for gas exchange ⚠️identify one level above and below alveoli, and list the levels or organisation in humans.
⚠️If an individual has a pneumonia infection, explain how this would likely affect the functioning of the circulatory system.

The researcher is developing a model for the alveoli
⚠️Describe a possible model that the researcher could use. Be use to explain how the model could be used to represent both healthy alveoli and alveoli that have been infected with pneumonia.