]> G eyefloss 2005.12.27 cluster0 I try to inhale oxygen cluster1 and then I try to exhale carbon dioxide. cluster2 I try to repeat this process approximately every three seconds. cluster3 This is what happens when I breathe. head0 _ _ o0 / ~ / thorax0 thorax head0->thorax0 head1 _ _ o0 / ~ / head0->head1 extremity00 extremity[0] thorax0->extremity00 extremity01 extremity[1] thorax0->extremity01 oxygen0 oxygen oxygen0->head0 inhale carbondioxide1 carbon dioxide head1->carbondioxide1 exhale head2 _ _ o0 / ~ / head1->head2 carbondioxide2 carbon dioxide head2->carbondioxide2 head3 _ _ o0 / ~ / head2->head3 oxygen2 oxygen oxygen2->head2 carbondioxide2->oxygen2 repeat thorax3 thorax head3->thorax3 extremity30 extremity[0] thorax3->extremity30 extremity31 extremity[1] thorax3->extremity31