If you could see inside an atom, how could you tell if it would have a positive charge?

If we r talking about the whole atom, we would see that the atom have higher number of protons (positive charges)than electrons (negative charges). That means the number of positiv charges are dominating over the number of negative charges which makes the atom a positiv charges atom

They carry out the exchange of gases as we breathe ( oxygen and carbon dioxide).

Aconductor easily transfer heat