A possible way how someone who has diabetes can end up affecting two other human body systems is by being dependent on their care. If you have diabetes and are dependent on the help and support of tho other people, you're effectively affecting two other human body systems.
The molecule will enter the cell using a channel protein.
World formula
6CO2(gas)+12H2O(liquid)+photons------------------------->C6H12O6(aqueous)+6O2(gas)+6H2O
carbon dioxide+ water+light energy-->glucose+oxygen+water