Silent, my body inhales.  

diaphragm contracts,
ribs lift,
atmospheric pressure pushes-  

oxygen, nitrogen, argon, ozone, sulfur dioxide, particulates, polycyclic aromatic hydrocarbons-  

expand my alveoli,
diffuse into my blood,  

webs of tubes and hoses,
gasp, sigh, sniff  

Gasp.
Silent.