Process:  -You breathe in -Air goes through all the little branches in your lungs to fill up the air sacs, or alveoli -Oxygen goes through the walls of the alveoli and into the capillaries -The oxygen goes into the bloodstream -Oxygen is left and carbon dioxide is picked up -You breathe it out through your lungs -
 Question: What is the effect of more air sacs filled on a smaller amount of oxygen being delivered to the blood stream.?
against