How would I describe how the exchange of O2 and CO2 occurs between your lungs and blood?

Also I need to discuss which mechanism of transport is used during gas exchange.



If I understand this right, my answer should be: Oxygen diffuses into capillaries from the alveoli and is transported to the heart. Also, carbon dioxide diffuses into capillaries from the aleoli and then expelled. This is an example of simple diffusion.



Is this the right answer, or am I leaving something out? It feels like I am.How would I describe how the exchange of O2 and CO2 occurs between your lungs and blood?I guess you could mention that the gases are transported by red blood cells (RBC) but at the basic level, yes, that's what happens. If you want, you could include how the gas enters the body (e.g.: nostrils, mouth, trachea, etc.)