References can provide information on personal characteristics. The background check can be considered as a preemptive measure to ensure the integrity of the organization and the safety of employees. Individuals may not be appropriate for certain positions due to some aspect of their history.
In the lungs. The carbon dioxide/oxygen diffuses through the capillaries surrounding the alveoli (grape like structures) in the lungs
By keeping the care at the highest possible level that you can offer and going above and beyond the job.