
The four parts of the respiratory system affected by the diseases are underlined in the table. Describe the specific role of EACH of these parts in the respiratory system.

Identify the main gas that diffuses out of the alveolus and into the capillary.
Explain why oxygen diffuses out of the alveoli and into the capillary.

State the path air follows starting from the nose
Briefly explain why your breathing and heart rate increase when you excercise.
Identify the main gas that diffuses out of the capillary and into the aveolus.
At point X, blood is coming from the heart and into the lungs. At point X, which gas is at a higher concentration in the blood?