Objective 53: Dalton's law, Boyles law

This has got be the most confusing objective to me because really I do not understand it at all.  Honestly I really can not say I have learned anything.  But I will try to break it down on what I have researched I can not say learned but researched.  I understand movement of the respiratory gases is due to diffusion. Diffusion results from a concentration gradient which is expressed for gases as the difference in partial pressures.  I think Boyle's Law relates to inspiration and expiration in that these two processes are stimulated by differences in  atmospheric pressure and internal pressures.  Dalton's law is that the composition of each gas does not effect the pressure.