Quote from Mark XDa Lego man, ha ha ^_^
Quote from CamilaTo breathe.
Quote from heavenyeahBut it's always easy...
Quote from TrissYou see, when you breath, you inhale air and some other stuffs.
The other stuffs are catched on by you nose hairs, and the air goes inside your lungs.
After it's inside, it gonna transfer Oxygen to the blood.
There are many other complex to thing to say, but my point is clear.
Breathing is complex.
Quote from heavenyeahExample: Transformation of oxygen in carbon dioxide, calculate the movement of the diaphragm, lung contraction, time interval between the end and beginning of inspiration and expiration, different in mode when difference of emotion. So everything is complex. I mean it's easy TO DO.