Environnment, lifestyle choices,insurance and genetics.
This choice is rational, the environment in which you live determines good or bad health. You strive to make the environment better. For example, doing away with a dirt littered living situation, same to lifestyle choices .if you make good choices eating healthily, engaging in physical activities to keep fit and having a disciplined routine then you are sure of good health.the rest can be controlled after the first two have been well taken care of.
Yes the lungs are composed of tiny air sacs called alveoli
LOL NO IDEA BUT IF I WERE YOU I WOULD LEAVE IT ALONE
There are a lot, however the one real nutrient you should ever really worry about with diabetes are carbohydrates; Primarily Fibers and sugars.