What is the tiny sac that is the site for gas exchange with the blood

Write a personal plan that can be used to reduce or prevent injury. identify the hazards you would like to prevent from occurring. include strategies in your plan that can be used to address peer pressure and other influences (both internal and external). use valid research sources to create your personal plan.

In this model, what do p, s, and a bases represent?

How you feel when someone is boastful and self absorbed when providing you a professional service? why?