How does the respiratory system work at the tissue level

my answer was deleted recently for me say i didnt know how to anwser it but i was just trying to explain i didnt really have teh right words for it and id try my best  the went me down two ranks you are a very rude person and shouldnt delete peaples answers for notin anyway pal  im talking to a mod about this >:(

only about ten percent of the energy at one trophic level is passed on to organisms at the next trophic level. the remainder of the energy is used in life processes or lost as heat.

i think the answer is composed of atoms