How do you evaluate health products

The obligation of a medical coder to keep patients' medical information confidential is an example of the theory of ethics.

Lina went camping in the woods. while camping, she accidentally touched a strange plant. her hand immediately started itching, and her skin erupted in hives. after she got home, her grandmother cooked some oatmeal, wrapped it in a cloth, and put it on lina’s affected hand. lina’s grandmother followed a traditional remedy.

Which of the following is the definition of ventilation as it relates to the respiratory system?