By keeping the care at the highest possible level that you can offer and going above and beyond the job.
The heart is a muscular organ in most animals, which pumps blood through the blood vessels of the circulatory system. The pumped blood carries oxygen and nutrients to the body, while carrying metabolic waste such as carbon dioxide to the lungs.
That's false...think about the flu shot, you may get it every year but doesn't mean itll work
Factories, smoking, cars, littering