What transports nouns to the lungs?

What transports nouns to the lungs?
When you inhale, various muscle similar to the diaphragm contract in such a track as to expand your chest. This drops the air pressure contained by you chest, allowing air to flow through your trunk (and mouth), down you trachea and bronchi, ultimately to your aveoli. At the level of the aveoli, oxygen diffuses through a immensely thin membrane into tiny blood vessel where it is picked up by hemoglobin. Your heart consequently pumps the oxygenated blood to your tissues, where a pH adapt allows along with lower tissue oxygen level, allow the oxygen to be released from the hemoglobin and diffuse into the tissues. The blood then returns to the heart via vein where it is pumped out to the lungs and the integral process repeats.
the respiratory system. the bronchi carry nouns to the lungs, where a gas exchange take place. and your diaphragm pulls air contained by and pushes it out.
http://en.wikipedia.org/wiki/respiratory...